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</div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2304.02416">arXiv:2304.02416</a> <span> [<a href="https://arxiv.org/pdf/2304.02416">pdf</a>, <a href="https://arxiv.org/format/2304.02416">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Wakefields of the FCC-ee collimation system </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Behtouei%2C+M">Mostafa Behtouei</a>, <a href="/search/physics?searchtype=author&query=Carideo%2C+E">Emanuela Carideo</a>, <a href="/search/physics?searchtype=author&query=Zobov%2C+M">Mikhail Zobov</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">Mauro Migliorati</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2304.02416v1-abstract-short" style="display: inline;"> The purpose of this paper is to calculate the longitudinal and transverse wakefields of the FCC collimators by using the electromagnetic codes ECHO3D and IW2D. We cross-checked our results using CST particle studio for long bunches, and found them to be in good agreement. The obtained results show that the collimators give one of the highest contributions to the overall FCC-ee wake potentials. Usi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.02416v1-abstract-full').style.display = 'inline'; document.getElementById('2304.02416v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2304.02416v1-abstract-full" style="display: none;"> The purpose of this paper is to calculate the longitudinal and transverse wakefields of the FCC collimators by using the electromagnetic codes ECHO3D and IW2D. We cross-checked our results using CST particle studio for long bunches, and found them to be in good agreement. The obtained results show that the collimators give one of the highest contributions to the overall FCC-ee wake potentials. Using the code PyHEADTAIL, we have found that the presence of the geometric wakefield of the collimators leads to the occurrence of transverse mode coupling instability (TMCI) at a significantly lower bunch population as compared to that of all other contributions and solutions to reduce this geometric term must be found. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.02416v1-abstract-full').style.display = 'none'; document.getElementById('2304.02416v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 April, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2304.00135">arXiv:2304.00135</a> <span> [<a href="https://arxiv.org/pdf/2304.00135">pdf</a>, <a href="https://arxiv.org/format/2304.00135">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Optics design and correction challenges for the high energy booster of FCC-ee </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Chance%2C+A">Antoine Chance</a>, <a href="/search/physics?searchtype=author&query=Dalena%2C+B">Barbara Dalena</a>, <a href="/search/physics?searchtype=author&query=Da+Silva%2C+T">Tatiana Da Silva</a>, <a href="/search/physics?searchtype=author&query=Mashal%2C+A">Ahmad Mashal</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">Mauro Migliorati</a>, <a href="/search/physics?searchtype=author&query=Ghribi%2C+A">Adnan Ghribi</a>, <a href="/search/physics?searchtype=author&query=Rajabi%2C+A">Ali Rajabi</a>, <a href="/search/physics?searchtype=author&query=Zimmermann%2C+F">Frank Zimmermann</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2304.00135v2-abstract-short" style="display: inline;"> One of the major upcoming challenges in particle physics is achieving precise measurements of the Z, W, and H bosons, as well as the top quark. To meet these targets, the next e\textsuperscript{+}e\textsuperscript{-} collider complex, FCC-ee, will need to achieve unprecedented luminosities. The FCC-IS European Study is investigating the feasibility of these challenges, with a cornerstone of the st… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.00135v2-abstract-full').style.display = 'inline'; document.getElementById('2304.00135v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2304.00135v2-abstract-full" style="display: none;"> One of the major upcoming challenges in particle physics is achieving precise measurements of the Z, W, and H bosons, as well as the top quark. To meet these targets, the next e\textsuperscript{+}e\textsuperscript{-} collider complex, FCC-ee, will need to achieve unprecedented luminosities. The FCC-IS European Study is investigating the feasibility of these challenges, with a cornerstone of the study being the design and optimization of the high-energy booster (HEB). This paper provides an update on the status of the HEB of FCC-ee in light of recent developments in the injector and collider survey, as well as an overview of ongoing work on longitudinal stability and design robustness in relation to field, alignment, and diagnostics errors. Constraints and effects related to the design frequency of the accelerating cavities, as well as collective effects, are also highlighted. Lastly, the paper presents an investigation into an alternative arcs cell design. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.00135v2-abstract-full').style.display = 'none'; document.getElementById('2304.00135v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 April, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">pre-print of ICFA Newsletter 2023</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2208.06466">arXiv:2208.06466</a> <span> [<a href="https://arxiv.org/pdf/2208.06466">pdf</a>, <a href="https://arxiv.org/format/2208.06466">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> A fast tracking code for evaluating collective effects in linear accelerators </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bosco%2C+F">F. Bosco</a>, <a href="/search/physics?searchtype=author&query=Camacho%2C+O">O. Camacho</a>, <a href="/search/physics?searchtype=author&query=Carillo%2C+M">M. Carillo</a>, <a href="/search/physics?searchtype=author&query=Chiadroni%2C+E">E. Chiadroni</a>, <a href="/search/physics?searchtype=author&query=Faillace%2C+L">L. Faillace</a>, <a href="/search/physics?searchtype=author&query=Fukasawa%2C+A">A. Fukasawa</a>, <a href="/search/physics?searchtype=author&query=Giribono%2C+A">A. Giribono</a>, <a href="/search/physics?searchtype=author&query=Giuliano%2C+L">L. Giuliano</a>, <a href="/search/physics?searchtype=author&query=Najernik%2C+N">N. Najernik</a>, <a href="/search/physics?searchtype=author&query=Mostacci%2C+A">A. Mostacci</a>, <a href="/search/physics?searchtype=author&query=Palumbo%2C+L">L. Palumbo</a>, <a href="/search/physics?searchtype=author&query=Spataro%2C+B">B. Spataro</a>, <a href="/search/physics?searchtype=author&query=Vaccarezza%2C+C">C. Vaccarezza</a>, <a href="/search/physics?searchtype=author&query=Rosenzweig%2C+J+B">J. B. Rosenzweig</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">M. Migliorati</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2208.06466v1-abstract-short" style="display: inline;"> The demands on performance of advanced linear accelerator based facilities strongly depend on the quality of the particle beams produced by such machines. Indeed, state-of-the-art applications in photon production and high-energy physics colliders require to use very high brightness electron beams, implying the coexistence of high peak currents and small transverse emittances. In such systems, the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.06466v1-abstract-full').style.display = 'inline'; document.getElementById('2208.06466v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2208.06466v1-abstract-full" style="display: none;"> The demands on performance of advanced linear accelerator based facilities strongly depend on the quality of the particle beams produced by such machines. Indeed, state-of-the-art applications in photon production and high-energy physics colliders require to use very high brightness electron beams, implying the coexistence of high peak currents and small transverse emittances. In such systems, the nominal phase-space density may be diluted by the presence of self-induced electromagnetic fields, causing interaction among charged particles through space charge forces and the excitation of wakefields. The two sources of collective effects may both be present in significant levels, and be coupled by the strong externally applied transverse and longitudinal fields present in modern high gradient linear accelerators. Thus, beam dynamics studies investigating all relevant effects, applied and collective, are necessary to predict the operational limitations of a given instrument. Such modeling, involving a large number of computational particles, can require significant numerical resources. In this paper we present a fast tracking code which permits accurate evaluation of wakefield effects in rf linacs, while also including a simple, robust model for space-charge forces to streamline the computations. The features of such a tool are discussed in detail in this paper and comparisons with more time-intensive commonly used tracking codes or analytical models are utilized to validate the approach we introduce. In addition, the applications motivating the development of this code define unique and challenging scenarios from the perspective of beam physics. Specifically, the fast simulation framework developed in this paper aims to describe intense electron beams injected at low energy in high-gradient accelerating structures which introduce strong rf focusing as well as strong wakefield interactions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.06466v1-abstract-full').style.display = 'none'; document.getElementById('2208.06466v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 August, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">16 pages, 12 captioned figures (19 total images)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2207.11551">arXiv:2207.11551</a> <span> [<a href="https://arxiv.org/pdf/2207.11551">pdf</a>, <a href="https://arxiv.org/format/2207.11551">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Theory of Diffraction by Holes of Arbitrary Sizes </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Behtouei%2C+M">Mostafa Behtouei</a>, <a href="/search/physics?searchtype=author&query=Faillace%2C+L">Luigi Faillace</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">Mauro Migliorati</a>, <a href="/search/physics?searchtype=author&query=Palumbo%2C+L">Luigi Palumbo</a>, <a href="/search/physics?searchtype=author&query=Spataro%2C+B">Bruno Spataro</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2207.11551v1-abstract-short" style="display: inline;"> New high-gradient accelerating RF cavities are nowadays developed in several national laboratories for high-energy physics applications. Ultra high gradients, up to the order of GV/m, can be achieved by using ultra compact accelerating structures in the sub-THz regime. Nevertheless, the experimental setup for measuring the main RF parameters for such compact structures is not trivial and can easil… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.11551v1-abstract-full').style.display = 'inline'; document.getElementById('2207.11551v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2207.11551v1-abstract-full" style="display: none;"> New high-gradient accelerating RF cavities are nowadays developed in several national laboratories for high-energy physics applications. Ultra high gradients, up to the order of GV/m, can be achieved by using ultra compact accelerating structures in the sub-THz regime. Nevertheless, the experimental setup for measuring the main RF parameters for such compact structures is not trivial and can easily produce errors due to lack of accuracy. Moreover, Radio-Frequency (RF) simulations for these types of cavities can require a large amount of computational time. In particular, one of the main RF parameters that needs to be evaluated and measured for the accelerating structures is the reflection coefficient. In order to obtain a fast and accurate analytical estimation, we have developed the electromagnetic theory for the calculation of the coupling of a resonant cavity with an RF waveguide. This theory is based on the Bethe's small aperture polarization approach, also developed by Collin's. In this paper, we give an exact analytical expression of the reflection coefficient as function of the physics parameters of the cavity-waveguide system, which can be applied to any geometry, material and frequency. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.11551v1-abstract-full').style.display = 'none'; document.getElementById('2207.11551v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 July, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2207.03601">arXiv:2207.03601</a> <span> [<a href="https://arxiv.org/pdf/2207.03601">pdf</a>, <a href="https://arxiv.org/format/2207.03601">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Investigations on the multi-sector hard X-Band Structures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Dolgashev%2C+V+A">V. A. Dolgashev</a>, <a href="/search/physics?searchtype=author&query=Faillace%2C+L">L. Faillace</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">M. Migliorati</a>, <a href="/search/physics?searchtype=author&query=Spataro%2C+B">B. Spataro</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2207.03601v1-abstract-short" style="display: inline;"> The development of high gradient accelerating structures is one of the leading activities of the accelerator community. In the technological research of new construction methods for these devices, high-power testing is a critical step for the verification of their viability. Recent experiments showed that accelerating cavities made from hard copper alloys, can achieve better performance as compare… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.03601v1-abstract-full').style.display = 'inline'; document.getElementById('2207.03601v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2207.03601v1-abstract-full" style="display: none;"> The development of high gradient accelerating structures is one of the leading activities of the accelerator community. In the technological research of new construction methods for these devices, high-power testing is a critical step for the verification of their viability. Recent experiments showed that accelerating cavities made from hard copper alloys, can achieve better performance as compared with soft copper ones. The results of experiments showed that welded, hard copper cavities have shown breakdown rate of $10^{-3}$/pulse/meter at a gradient of about 150 MV/m, in the X-band, a using a shaped pulse with a 150 ns flat part. We continue the design, construction, and higher power experimental tests of three cells standing wave (SW) 11.424 GHz accelerating cavities fabricated with hard CuAg alloy to study the RF breakdown physics. Our aim is to fabricate the accelerating structures with innovative technologies easier to handle and cheaper; easier for surfaces inspection; easier for data elaboration and validation of joining techniques. The choice of these new technological approaches and design methods provides also the possibility of allocating the parasitic Higher Order Mode dampers. This paper describes the design of an optimized cavity made with sectors which provides a high longitudinal shunt impedance $R_{sh}$ of the operating mode. The cavity will be fabricated by using the Tungsten Inert Gas process to realize a hard CuAg structure. Two three-cells SW X-band accelerating cavities, to be operated in the $蟺$-mode and made out of hard CuAg alloy, were already fabricated at INFN-LNF by means of clamping and welding by using the TIG approach. Finally, we also report the RF characterization and low-power RF tests of a two-halves split hard CuAg structure that will be consequently TIG welded and employed for high-gradient tests and for the study of the RF breakdown physics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.03601v1-abstract-full').style.display = 'none'; document.getElementById('2207.03601v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 July, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 18 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2204.04616">arXiv:2204.04616</a> <span> [<a href="https://arxiv.org/pdf/2204.04616">pdf</a>, <a href="https://arxiv.org/format/2204.04616">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Impedance modelling and collective effects in the Future Circular e$^+$e$^-$ Collider with 4 IPs </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">M. Migliorati</a>, <a href="/search/physics?searchtype=author&query=Antuono%2C+C">C. Antuono</a>, <a href="/search/physics?searchtype=author&query=Carideo%2C+E">E. Carideo</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+Y">Y. Zhang</a>, <a href="/search/physics?searchtype=author&query=Zobov%2C+M">M. Zobov</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2204.04616v1-abstract-short" style="display: inline;"> The FCC-ee impedance model is being constantly updated closely following the vacuum chamber design and parameters evolution. In particular, at present, a thicker NEG coating of 150 nm (instead of previous 100 nm) has been suggested by the vacuum experts, and a more realistic impedance model of the bellows has been investigated. Moreover, also the transverse impedance has been updated by considerin… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2204.04616v1-abstract-full').style.display = 'inline'; document.getElementById('2204.04616v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2204.04616v1-abstract-full" style="display: none;"> The FCC-ee impedance model is being constantly updated closely following the vacuum chamber design and parameters evolution. In particular, at present, a thicker NEG coating of 150 nm (instead of previous 100 nm) has been suggested by the vacuum experts, and a more realistic impedance model of the bellows has been investigated. Moreover, also the transverse impedance has been updated by considering the same sources as for the longitudinal case. Therefore, the FCC-ee impedance database is getting more complete and the impedance model is being refined. In this paper we describe the presently available machine coupling impedance in both longitudinal and transverse planes, and study the impedance-driven single bunch instabilities (with and without beam-beam interaction) for the new FCC-ee parameter set with 4 interaction points (IPs). The results are compared with the previously obtained ones and a further possible mitigation of the beam-beam head-tail instability (X-Z instability) is proposed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2204.04616v1-abstract-full').style.display = 'none'; document.getElementById('2204.04616v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 April, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2112.10674">arXiv:2112.10674</a> <span> [<a href="https://arxiv.org/pdf/2112.10674">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/17/04/C04005">10.1088/1748-0221/17/04/C04005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Time-Of-Flight methodologies with large-area diamond detectors for the effectively characterization of tens of MeV protons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Salvadori%2C+M">M. Salvadori</a>, <a href="/search/physics?searchtype=author&query=Andreoli%2C+P+L">P. L. Andreoli</a>, <a href="/search/physics?searchtype=author&query=Cipriani%2C+M">M. Cipriani</a>, <a href="/search/physics?searchtype=author&query=Cristofari%2C+G">G. Cristofari</a>, <a href="/search/physics?searchtype=author&query=De+Angelis%2C+R">R. De Angelis</a>, <a href="/search/physics?searchtype=author&query=Malko%2C+S">S. Malko</a>, <a href="/search/physics?searchtype=author&query=Volpe%2C+L">L. Volpe</a>, <a href="/search/physics?searchtype=author&query=Hernandez%2C+J+A+P">J. A. Perez Hernandez</a>, <a href="/search/physics?searchtype=author&query=Alpinaniz%2C+J+I">J. I. Alpinaniz</a>, <a href="/search/physics?searchtype=author&query=Morace%2C+A">A. Morace</a>, <a href="/search/physics?searchtype=author&query=Antici%2C+P">P. Antici</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">M. Migliorati</a>, <a href="/search/physics?searchtype=author&query=Di+Giorgio%2C+G">G. Di Giorgio</a>, <a href="/search/physics?searchtype=author&query=Consoli%2C+F">F. Consoli</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2112.10674v1-abstract-short" style="display: inline;"> A novel detector based on a polycrystalline diamond sensor is here employed in an advanced Time-Of-Flight scheme for the characterization of energetic ions accelerated during laser-matter interactions. The optimization of the detector and of the advanced TOF methodology allow to obtain signals characterized by high signal-to-noise ratio and high dynamic range even in the most challenging experimen… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.10674v1-abstract-full').style.display = 'inline'; document.getElementById('2112.10674v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2112.10674v1-abstract-full" style="display: none;"> A novel detector based on a polycrystalline diamond sensor is here employed in an advanced Time-Of-Flight scheme for the characterization of energetic ions accelerated during laser-matter interactions. The optimization of the detector and of the advanced TOF methodology allow to obtain signals characterized by high signal-to-noise ratio and high dynamic range even in the most challenging experimental environments, where the interaction of high-intensity laser pulses with matter leads to effective ion acceleration, but also to the generation of strong Electromagnetic Pulses (EMPs) with intensities up to the MV/m order. These are known to be a serious threat for the fielded diagnostic systems. In this paper we report on the measurement performed with the PW-class laser system Vega 3 at CLPU (30 J energy, 10^21 W/cm2 intensity, 30 fs pulses) irradiating solid targets, where both tens of MeV ions and intense EMP fields were generated. The data were analyzed to retrieve a calibrated proton spectrum and in particular we focus on the analysis of the most energetic portion (E > 5.8 MeV) of the spectrum showing a procedure to deal with the intrinsic lower sensitivity of the detector in the mentioned spectral-range. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.10674v1-abstract-full').style.display = 'none'; document.getElementById('2112.10674v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 December, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2110.15661">arXiv:2110.15661</a> <span> [<a href="https://arxiv.org/pdf/2110.15661">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Time-Of-Flight methodologies with large-area diamond detectors for ion characterization in laser-driven experiments </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Salvadori%2C+M">M. Salvadori</a>, <a href="/search/physics?searchtype=author&query=Di+Giorgio%2C+G">G. Di Giorgio</a>, <a href="/search/physics?searchtype=author&query=Cipriani%2C+M">M. Cipriani</a>, <a href="/search/physics?searchtype=author&query=Verona%2C+C">C. Verona</a>, <a href="/search/physics?searchtype=author&query=Andreoli%2C+P+L">P. L. Andreoli</a>, <a href="/search/physics?searchtype=author&query=Cristofari%2C+G">G. Cristofari</a>, <a href="/search/physics?searchtype=author&query=De+Angelis%2C+R">R. De Angelis</a>, <a href="/search/physics?searchtype=author&query=Pillon%2C+M">M. Pillon</a>, <a href="/search/physics?searchtype=author&query=Andreev%2C+N+E">N. E. Andreev</a>, <a href="/search/physics?searchtype=author&query=Antici%2C+P">P. Antici</a>, <a href="/search/physics?searchtype=author&query=Borisenko%2C+N+G">N. G. Borisenko</a>, <a href="/search/physics?searchtype=author&query=Giulietti%2C+D">D. Giulietti</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">M. Migliorati</a>, <a href="/search/physics?searchtype=author&query=Rosmej%2C+O">O. Rosmej</a>, <a href="/search/physics?searchtype=author&query=Zahter%2C+S">S. Zahter</a>, <a href="/search/physics?searchtype=author&query=Consoli%2C+F">F. Consoli</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2110.15661v1-abstract-short" style="display: inline;"> Time-Of-Flight (TOF) technique coupled with semiconductor detectors is a powerful instrument to provide real-time characterization of ions accelerated because of laser-matter interactions. Nevertheless, the presence of strong electromagnetic pulses (EMPs) generated during the interactions, can severely hinder its employment. For this reason, the diagnostic system must be designed to have high EMP… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.15661v1-abstract-full').style.display = 'inline'; document.getElementById('2110.15661v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2110.15661v1-abstract-full" style="display: none;"> Time-Of-Flight (TOF) technique coupled with semiconductor detectors is a powerful instrument to provide real-time characterization of ions accelerated because of laser-matter interactions. Nevertheless, the presence of strong electromagnetic pulses (EMPs) generated during the interactions, can severely hinder its employment. For this reason, the diagnostic system must be designed to have high EMP shielding. Here we present a new advanced prototype of detector, developed at ENEA-Centro Ricerche Frascati (Italy), with a large area (15 mm x 15 mm) polycrystalline diamond sensor having 150 microns thickness. The tailored detector design and testing ensure high sensitivity and, thanks to the fast temporal response, high energy resolution of the reconstructed ion spectrum. The detector was offline calibrated and then successfully tested during an experimental campaign carried out at the PHELIX laser facility at GSI (Germany). The high rejection to EMP fields was demonstrated and suitable calibrated spectra of the accelerated protons were obtained. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.15661v1-abstract-full').style.display = 'none'; document.getElementById('2110.15661v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.04464">arXiv:2109.04464</a> <span> [<a href="https://arxiv.org/pdf/2109.04464">pdf</a>, <a href="https://arxiv.org/format/2109.04464">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> A Novel method to calculate the magnetic field of a Solenoid generated by a surface current element </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Behtouei%2C+M">M. Behtouei</a>, <a href="/search/physics?searchtype=author&query=Spataro%2C+B">B. Spataro</a>, <a href="/search/physics?searchtype=author&query=Faillace%2C+L">L. Faillace</a>, <a href="/search/physics?searchtype=author&query=Carillo%2C+M">M. Carillo</a>, <a href="/search/physics?searchtype=author&query=Comelli%2C+M">M. Comelli</a>, <a href="/search/physics?searchtype=author&query=Variola%2C+A">A. Variola</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">M. Migliorati</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2109.04464v1-abstract-short" style="display: inline;"> The purpose of this paper is to derive the on and off-axes magnetic field of a solenoid with the use of a novel method. We have found a solution for the Biot-Savart law by considering the solenoid with a stationary electric current. The results have been compared to numerical simulations showing a good agreement. </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.04464v1-abstract-full" style="display: none;"> The purpose of this paper is to derive the on and off-axes magnetic field of a solenoid with the use of a novel method. We have found a solution for the Biot-Savart law by considering the solenoid with a stationary electric current. The results have been compared to numerical simulations showing a good agreement. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.04464v1-abstract-full').style.display = 'none'; document.getElementById('2109.04464v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.03954">arXiv:2109.03954</a> <span> [<a href="https://arxiv.org/pdf/2109.03954">pdf</a>, <a href="https://arxiv.org/format/2109.03954">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> A hard open X-band RF accelerating structure made by two halves </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Spataro%2C+B">Bruno Spataro</a>, <a href="/search/physics?searchtype=author&query=Behtouei%2C+M">Mostafa Behtouei</a>, <a href="/search/physics?searchtype=author&query=Cardelli%2C+F">Fabio Cardelli</a>, <a href="/search/physics?searchtype=author&query=Carillo%2C+M">Martina Carillo</a>, <a href="/search/physics?searchtype=author&query=Dolgashev%2C+V">Valery Dolgashev</a>, <a href="/search/physics?searchtype=author&query=Faillace%2C+L">Luigi Faillace</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">Mauro Migliorati</a>, <a href="/search/physics?searchtype=author&query=Palumbo%2C+L">Luigi Palumbo</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2109.03954v1-abstract-short" style="display: inline;"> High-gradient linacs of next generation require novel accelerating structures which are compact, robust and cost-effective. Dedicated research and development have been launched in the linear-collider community. This paper focuses on the technological developments directed to show the viability of novel welding techniques and related applications, in order to benefit from the superior high-gradien… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.03954v1-abstract-full').style.display = 'inline'; document.getElementById('2109.03954v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.03954v1-abstract-full" style="display: none;"> High-gradient linacs of next generation require novel accelerating structures which are compact, robust and cost-effective. Dedicated research and development have been launched in the linear-collider community. This paper focuses on the technological developments directed to show the viability of novel welding techniques and related applications, in order to benefit from the superior high-gradient performance of accelerating structures made of hard-copper alloys. The structure geometry that we propose allows getting a high longitudinal shunt impedance of the accelerating mode and increasing the mode separation frequencies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.03954v1-abstract-full').style.display = 'none'; document.getElementById('2109.03954v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.03520">arXiv:2109.03520</a> <span> [<a href="https://arxiv.org/pdf/2109.03520">pdf</a>, <a href="https://arxiv.org/format/2109.03520">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Relativistic approach to a low perveance high quality matched beam for a high efficiency Ka-Band klystron </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Behtouei%2C+M">M. Behtouei</a>, <a href="/search/physics?searchtype=author&query=Spataro%2C+B">B. Spataro</a>, <a href="/search/physics?searchtype=author&query=Faillace%2C+L">L. Faillace</a>, <a href="/search/physics?searchtype=author&query=Carillo%2C+M">M. Carillo</a>, <a href="/search/physics?searchtype=author&query=Leggieri%2C+A">A. Leggieri</a>, <a href="/search/physics?searchtype=author&query=Palumbo%2C+L">L. Palumbo</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">M. Migliorati</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2109.03520v1-abstract-short" style="display: inline;"> Advanced technical solution for the design of a low perveance electron gun with a high quality beam dedicated to high power Ka-band klystrons is presented in this paper. The proposed electron gun can be used to feed linear accelerating structures at 36 GHz with an estimated input power of 20 MW, thus achieving an effective accelerating electric field in the (100-150) MV/m range. additionally, in t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.03520v1-abstract-full').style.display = 'inline'; document.getElementById('2109.03520v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.03520v1-abstract-full" style="display: none;"> Advanced technical solution for the design of a low perveance electron gun with a high quality beam dedicated to high power Ka-band klystrons is presented in this paper. The proposed electron gun can be used to feed linear accelerating structures at 36 GHz with an estimated input power of 20 MW, thus achieving an effective accelerating electric field in the (100-150) MV/m range. additionally, in the framework of the Compact Light XLS project, a short Ka-band accelerating structure providing an integrated voltage of at least 15 MV, has been proposed for bunch-phase linearization. For the klystron, a very small beam dimension is needed and the presented electron gun responds to this requirement. An estimate of the rotational velocity at beam edge indicates that the diamagnetic field due to rotational currents are small compared to the longitudinal volume. A detailed analysis of how this is arrived at, by compression of the beam, rotation in the magnetic field, and analysis of the subsequently generated diamagnetic field has been discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.03520v1-abstract-full').style.display = 'none'; document.getElementById('2109.03520v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">arXiv admin note: text overlap with arXiv:2012.03737</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2106.05557">arXiv:2106.05557</a> <span> [<a href="https://arxiv.org/pdf/2106.05557">pdf</a>, <a href="https://arxiv.org/format/2106.05557">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Self-consistent derivation of the transverse mode coupling instability for coasting beams using the linearized Vlasov equation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Biancacci%2C+N">N. Biancacci</a>, <a href="/search/physics?searchtype=author&query=M%C3%A9tral%2C+E">E. M茅tral</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">M. Migliorati</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2106.05557v1-abstract-short" style="display: inline;"> The mode coupling instability for coasting beams has been discussed in a previous paper using macroparticle tracking simulations from the pyHeadTail code and a simple analytical formula which was proposed as an extension of the ansatz used for the single-particle formalism. In this paper, we propose a self-consistent derivation of this formula based on the linearized Vlasov equation. The proposed… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.05557v1-abstract-full').style.display = 'inline'; document.getElementById('2106.05557v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2106.05557v1-abstract-full" style="display: none;"> The mode coupling instability for coasting beams has been discussed in a previous paper using macroparticle tracking simulations from the pyHeadTail code and a simple analytical formula which was proposed as an extension of the ansatz used for the single-particle formalism. In this paper, we propose a self-consistent derivation of this formula based on the linearized Vlasov equation. The proposed mode coupling instability for coasting beams was never predicted or discussed in the past and we believe that the reason is twofold. First, to derive it analytically from the linearized Vlasov equation, one should not make the usual approximation $\sin(蠁)\simeq (e^{j蠁})/(2j)$, where $蠁$ is the transverse betatron phase, but really consider the two terms of $\sin(蠁)=(e^{j蠁}-e^{-j蠁})/(2j)$ as the second term is the one responsible for the mode coupling in coasting beams. It should be stressed here that mode coupling is found already with driving impedance only. Note that the previous approximation is also usually made for bunched beams and this case should therefore also be carefully reviewed in the future. Second, by including the detuning impedance, the coupling is much stronger and this is what we found also in pyHeadTail simulations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.05557v1-abstract-full').style.display = 'none'; document.getElementById('2106.05557v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 June, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2105.09698">arXiv:2105.09698</a> <span> [<a href="https://arxiv.org/pdf/2105.09698">pdf</a>, <a href="https://arxiv.org/format/2105.09698">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Challenges for the interaction region design of the Future Circular Collider FCC-ee </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Boscolo%2C+M">Manuela Boscolo</a>, <a href="/search/physics?searchtype=author&query=Bacchetta%2C+N">Nicola Bacchetta</a>, <a href="/search/physics?searchtype=author&query=Benedikt%2C+M">Michael Benedikt</a>, <a href="/search/physics?searchtype=author&query=Brunetti%2C+L">Laurent Brunetti</a>, <a href="/search/physics?searchtype=author&query=Burkhardt%2C+H">Helmut Burkhardt</a>, <a href="/search/physics?searchtype=author&query=Ciarma%2C+A">Andrea Ciarma</a>, <a href="/search/physics?searchtype=author&query=Dam%2C+M">Mogens Dam</a>, <a href="/search/physics?searchtype=author&query=Fransesini%2C+F">Francesco Fransesini</a>, <a href="/search/physics?searchtype=author&query=Jones%2C+M">Mark Jones</a>, <a href="/search/physics?searchtype=author&query=Kersevan%2C+R">Roberto Kersevan</a>, <a href="/search/physics?searchtype=author&query=Koratzinos%2C+M">Mike Koratzinos</a>, <a href="/search/physics?searchtype=author&query=Lueckhof%2C+M">Marian Lueckhof</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">Mauro Migliorati</a>, <a href="/search/physics?searchtype=author&query=Montbarbon%2C+E">Eva Montbarbon</a>, <a href="/search/physics?searchtype=author&query=Novokhatski%2C+A">Alexander Novokhatski</a>, <a href="/search/physics?searchtype=author&query=Oide%2C+K">Katsunobu Oide</a>, <a href="/search/physics?searchtype=author&query=Pellegrino%2C+L">Luigi Pellegrino</a>, <a href="/search/physics?searchtype=author&query=Poirier%2C+F">Freddy Poirier</a>, <a href="/search/physics?searchtype=author&query=Serluca%2C+M">Maurizio Serluca</a>, <a href="/search/physics?searchtype=author&query=Sullivan%2C+M+K">Michael K. Sullivan</a>, <a href="/search/physics?searchtype=author&query=Watrelot%2C+L">Leonard Watrelot</a>, <a href="/search/physics?searchtype=author&query=Zimmermann%2C+F">Frank Zimmermann</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2105.09698v1-abstract-short" style="display: inline;"> The FCC-ee is a proposed future high-energy, high-intensity and high-precision lepton collider. Here, we present the latest development for the FCC-ee interaction regions, which shall ensure optimum conditions for the particle physics experiments. We discuss measures of background reduction and a revised interaction region layout including a low impedance compact beam chamber design. We also discu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.09698v1-abstract-full').style.display = 'inline'; document.getElementById('2105.09698v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2105.09698v1-abstract-full" style="display: none;"> The FCC-ee is a proposed future high-energy, high-intensity and high-precision lepton collider. Here, we present the latest development for the FCC-ee interaction regions, which shall ensure optimum conditions for the particle physics experiments. We discuss measures of background reduction and a revised interaction region layout including a low impedance compact beam chamber design. We also discuss the possible impact of the radiation generated in the interaction region including beamstrahlung. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.09698v1-abstract-full').style.display = 'none'; document.getElementById('2105.09698v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">3 pp, 5 figs, presented at IPAC21, May 24-28th, 2021</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> WEPAB029 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2102.08049">arXiv:2102.08049</a> <span> [<a href="https://arxiv.org/pdf/2102.08049">pdf</a>, <a href="https://arxiv.org/format/2102.08049">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2021.165643">10.1016/j.nima.2021.165643 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Ultra-Compact Ka-band linearizer for the Ultra-Compact X-Ray Free-Electron Laser at UCLA </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Spataro%2C+B">Bruno Spataro</a>, <a href="/search/physics?searchtype=author&query=Behtouei%2C+M">Mostafa Behtouei</a>, <a href="/search/physics?searchtype=author&query=Faillace%2C+L">Luigi Faillace</a>, <a href="/search/physics?searchtype=author&query=Variola%2C+A">Alessandro Variola</a>, <a href="/search/physics?searchtype=author&query=Dolgashev%2C+V">Valery Dolgashev</a>, <a href="/search/physics?searchtype=author&query=Rosenzweig%2C+J">James Rosenzweig</a>, <a href="/search/physics?searchtype=author&query=Torrisi%2C+G">Giuseppe Torrisi</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">Mauro Migliorati</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2102.08049v1-abstract-short" style="display: inline;"> Notably innovative technologies will permit compact and affordable advanced accelerators as the linear collider and X-ray free-electron lasers (XFELs) with accelerating gradients over twice the value achieved with current technologies. In particular XFEL is able to produce coherent X-ray pulses with peak brightness 10 orders of magnitude greater than preceding approaches, which has revolutionized… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.08049v1-abstract-full').style.display = 'inline'; document.getElementById('2102.08049v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2102.08049v1-abstract-full" style="display: none;"> Notably innovative technologies will permit compact and affordable advanced accelerators as the linear collider and X-ray free-electron lasers (XFELs) with accelerating gradients over twice the value achieved with current technologies. In particular XFEL is able to produce coherent X-ray pulses with peak brightness 10 orders of magnitude greater than preceding approaches, which has revolutionized numerous fields through imaging of the nanoscopic world at the time and length scale of atom-based systems, that is of femtosecond and Angstrom. There is a strong interest for combining these two fields, to form a proper tool with the goal of producing a very compact XFEL in order to investigate multi-disciplinary researches in chemistry, biology, materials science, medicine and physics. In the framework of the Ultra -Compact XFEL project (UC-XFEL) under study at the UCLA, an ultra high gradient higher harmonic RF accelerating structure for the longitudinal space phase linearization is foreseen. To this aim, a Ka-Band linearizer (34.2 GHz) with an integrated voltage of at least 15 MV working on 6th harmonic with respect to the main Linac frequency (5.712 GHz) is required. We here present the electromagnetic design of a cold ultra compact Ka-band SW linearizer, 8 cm long, working on pi mode with an ultra high accelerating gradient (beyond 100 MV/m) and minimum surface electric field for minimizing the probability of RF breakdown. Moreover, we discuss a TW option and compare it with the initial SW structure, by means of main RF parameters as well as beam-dynamics considerations. The numerical electromagnetic studies have been performed by using the well known SuperFish, HFSS and CST. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.08049v1-abstract-full').style.display = 'none'; document.getElementById('2102.08049v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2004.01700">arXiv:2004.01700</a> <span> [<a href="https://arxiv.org/pdf/2004.01700">pdf</a>, <a href="https://arxiv.org/format/2004.01700">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Classical Analysis and ODEs">math.CA</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mathematical Physics">math-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Fractional Powers of the Differentiation and Integration Operators and its Application in Accelerator Physics and Technology </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Behtouei%2C+M">Mostafa Behtouei</a>, <a href="/search/physics?searchtype=author&query=Faillace%2C+L">Luigi Faillace</a>, <a href="/search/physics?searchtype=author&query=Palumbo%2C+L">Luigi Palumbo</a>, <a href="/search/physics?searchtype=author&query=Spataro%2C+B">Bruno Spataro</a>, <a href="/search/physics?searchtype=author&query=Variola%2C+A">Alessandro Variola</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">Mauro Migliorati</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2004.01700v1-abstract-short" style="display: inline;"> In this paper we present a solution to a fractional integral of the order 3/2 with the use of a novel method. The integral arises during solving the Biot-Savart equation to find the exact analytical solution for the magnetic field components of a solenoid. We solved the integral by cutting the branch line in order to have an analytic function inside the integral instead of multi-valued operation. </span> <span class="abstract-full has-text-grey-dark mathjax" id="2004.01700v1-abstract-full" style="display: none;"> In this paper we present a solution to a fractional integral of the order 3/2 with the use of a novel method. The integral arises during solving the Biot-Savart equation to find the exact analytical solution for the magnetic field components of a solenoid. We solved the integral by cutting the branch line in order to have an analytic function inside the integral instead of multi-valued operation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.01700v1-abstract-full').style.display = 'none'; document.getElementById('2004.01700v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Portions of this manuscript has been published in our previous paper with arXiv:2002.09444. In this paper we describe and analyze the mathematical process used in our previous paper with arXiv:2002.09444</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2003.10009">arXiv:2003.10009</a> <span> [<a href="https://arxiv.org/pdf/2003.10009">pdf</a>, <a href="https://arxiv.org/format/2003.10009">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Study of collective effects in the CERN FCC-ee top-up booster </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Quartullo%2C+D">D. Quartullo</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">M. Migliorati</a>, <a href="/search/physics?searchtype=author&query=Zobov%2C+M">M. Zobov</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2003.10009v1-abstract-short" style="display: inline;"> The CERN FCC-ee top-up booster synchrotron will accelerate electrons and positrons from an injection energy of 20 GeV up to an extraction energy between 45.6 GeV and 182.5 GeV depending on the operation mode. These accelerated beams will be used for the initial filling of the high-luminosity FCC-ee collider and for keeping the beam current constant over time using continuous top-up injection. Due… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.10009v1-abstract-full').style.display = 'inline'; document.getElementById('2003.10009v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2003.10009v1-abstract-full" style="display: none;"> The CERN FCC-ee top-up booster synchrotron will accelerate electrons and positrons from an injection energy of 20 GeV up to an extraction energy between 45.6 GeV and 182.5 GeV depending on the operation mode. These accelerated beams will be used for the initial filling of the high-luminosity FCC-ee collider and for keeping the beam current constant over time using continuous top-up injection. Due to the high-intensities of the circulating beams, collective effects may represent a limitation in the top-up booster. In this work we present a first evaluation of the impedance model and the effects on beam dynamics. Methods to mitigate possible instabilities will be also discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.10009v1-abstract-full').style.display = 'none'; document.getElementById('2003.10009v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2003.07615">arXiv:2003.07615</a> <span> [<a href="https://arxiv.org/pdf/2003.07615">pdf</a>, <a href="https://arxiv.org/format/2003.07615">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Review of impedance-induced instabilities and their possible mitigation techniques </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">M. Migliorati</a>, <a href="/search/physics?searchtype=author&query=M%C3%A9tral%2C+E">E. M茅tral</a>, <a href="/search/physics?searchtype=author&query=Zobov%2C+M">M. Zobov</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2003.07615v1-abstract-short" style="display: inline;"> In this paper a review of some important impedance-induced instabilities are briefly described for both the longitudinal and transverse planes. The main tools used nowadays to predict these instabilities and some considerations about possible mitigation techniques are also presented. </span> <span class="abstract-full has-text-grey-dark mathjax" id="2003.07615v1-abstract-full" style="display: none;"> In this paper a review of some important impedance-induced instabilities are briefly described for both the longitudinal and transverse planes. The main tools used nowadays to predict these instabilities and some considerations about possible mitigation techniques are also presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.07615v1-abstract-full').style.display = 'none'; document.getElementById('2003.07615v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2003.02759">arXiv:2003.02759</a> <span> [<a href="https://arxiv.org/pdf/2003.02759">pdf</a>, <a href="https://arxiv.org/format/2003.02759">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2020.164653">10.1016/j.nima.2020.164653 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A SW Ka-Band Linearizer Structure with Minimum Surface Electric Field for the Compact Light XLS Project </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Behtouei%2C+M">Mostafa Behtouei</a>, <a href="/search/physics?searchtype=author&query=Faillace%2C+L">Luigi Faillace</a>, <a href="/search/physics?searchtype=author&query=Spataro%2C+B">Bruno Spataro</a>, <a href="/search/physics?searchtype=author&query=Variola%2C+A">Alessandro Variola</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">Mauro Migliorati</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2003.02759v1-abstract-short" style="display: inline;"> There is a strong demand for accelerating structures able to achieve higher gradients and more compact dimensions for the next generation of linear accelerators for research, industrial and medical applications. In the framework of the Compact Light XLS project, an ultra high gradient higher harmonic RF accelerating structure is needed for the linearization of the longitudinal space phase. In orde… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.02759v1-abstract-full').style.display = 'inline'; document.getElementById('2003.02759v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2003.02759v1-abstract-full" style="display: none;"> There is a strong demand for accelerating structures able to achieve higher gradients and more compact dimensions for the next generation of linear accelerators for research, industrial and medical applications. In the framework of the Compact Light XLS project, an ultra high gradient higher harmonic RF accelerating structure is needed for the linearization of the longitudinal space phase. In order to determine the maximum sustainable gradients in normal conducting RF powered particle beam accelerators with extremely low probability of RF breakdown, investigations are in progress for using shorts accelerating structures in the Ka-band regime. We here report an electromagnetic design of a compact linearizer standing wave (SW) accelerating structure 8 cm long operating on $蟺$ mode, third harmonic with respect to the Linac frequency (11.994 GHz) with a 100 MV/m accelerating gradient and minimum surface electric field. Numerical electromagnetic studies have been performed by using the well known SuperFish, HFSS and CST computing software. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.02759v1-abstract-full').style.display = 'none'; document.getElementById('2003.02759v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2003.01442">arXiv:2003.01442</a> <span> [<a href="https://arxiv.org/pdf/2003.01442">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41598-021-82655-w">10.1038/s41598-021-82655-w <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Accurate spectra for high energy ions by advanced time-of-flight diamond-detector schemes in experiments with high energy and intensity lasers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Salvadori%2C+M">M. Salvadori</a>, <a href="/search/physics?searchtype=author&query=Consoli%2C+F">F. Consoli</a>, <a href="/search/physics?searchtype=author&query=Verona%2C+C">C. Verona</a>, <a href="/search/physics?searchtype=author&query=Cipriani%2C+M">M. Cipriani</a>, <a href="/search/physics?searchtype=author&query=Anania%2C+M+P">M. P. Anania</a>, <a href="/search/physics?searchtype=author&query=Andreoli%2C+P+L">P. L. Andreoli</a>, <a href="/search/physics?searchtype=author&query=Antici%2C+P">P. Antici</a>, <a href="/search/physics?searchtype=author&query=Bisesto%2C+F">F. Bisesto</a>, <a href="/search/physics?searchtype=author&query=Costa%2C+G">G. Costa</a>, <a href="/search/physics?searchtype=author&query=Cristofari%2C+G">G. Cristofari</a>, <a href="/search/physics?searchtype=author&query=De+Angelis%2C+R">R. De Angelis</a>, <a href="/search/physics?searchtype=author&query=Di+Giorgio%2C+G">G. Di Giorgio</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+M">M. Ferrario</a>, <a href="/search/physics?searchtype=author&query=Galletti%2C+M">M. Galletti</a>, <a href="/search/physics?searchtype=author&query=Giulietti%2C+D">D. Giulietti</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">M. Migliorati</a>, <a href="/search/physics?searchtype=author&query=Pompili%2C+R">R. Pompili</a>, <a href="/search/physics?searchtype=author&query=Zigler%2C+A">A. Zigler</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2003.01442v1-abstract-short" style="display: inline;"> Time-Of-Flight (TOF) methods are very effective to detect particles accelerated in laser-plasma interactions, but they shows significant limitations when used in experiments with high energy and intensity lasers, where both high-energy ions and remarkable levels of ElectroMagnetic Pulses (EMPs) in the radiofrequency-microwave range are generated. Here we describe a novel advanced diagnostic method… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.01442v1-abstract-full').style.display = 'inline'; document.getElementById('2003.01442v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2003.01442v1-abstract-full" style="display: none;"> Time-Of-Flight (TOF) methods are very effective to detect particles accelerated in laser-plasma interactions, but they shows significant limitations when used in experiments with high energy and intensity lasers, where both high-energy ions and remarkable levels of ElectroMagnetic Pulses (EMPs) in the radiofrequency-microwave range are generated. Here we describe a novel advanced diagnostic method for the characterization of protons accelerated by intense matter interactions with high-energy and high-intensity ultra-short laser pulses up to the femtosecond and even future attosecond range. The method employs a stacked diamond detector structure and the TOF technique, featuring high sensitivity, high resolution, high radiation hardness and high signal-to-noise ratio in environments heavily affected by remarkable EMP fields. A detailed study on the use, the optimization and the properties of a single module of the stack is here also described for an experiment where a fast diamond detector is employed in an highly EMP-polluted environment. Accurate calibrated spectra of accelerated protons are presented from an experiment with the femtosecond Flame laser (beyond 100 TW power and ~$10^{19}$ W/cm$^2$ intensity) interacting with thin foil targets. The results that can be readily applied to the case of complex stack configurations and to more general experimental conditions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.01442v1-abstract-full').style.display = 'none'; document.getElementById('2003.01442v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 8 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2002.09444">arXiv:2002.09444</a> <span> [<a href="https://arxiv.org/pdf/2002.09444">pdf</a>, <a href="https://arxiv.org/format/2002.09444">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> A Novel Exact Analytical Expression for the Magnetic Field of a Solenoid </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Behtouei%2C+M">Mostafa Behtouei</a>, <a href="/search/physics?searchtype=author&query=Faillace%2C+L">Luigi Faillace</a>, <a href="/search/physics?searchtype=author&query=Spataro%2C+B">Bruno Spataro</a>, <a href="/search/physics?searchtype=author&query=Variola%2C+A">Alessandro Variola</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">Mauro Migliorati</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2002.09444v2-abstract-short" style="display: inline;"> In this paper we present the analytical calculations to derive the magnetic field of a solenoid by solving exactly a fractional integral with the use of a novel method. Starting from the Biot-Savart law, we consider a coil of negligible thickness with a stationary electric current. We derive the expressions of the on and off-axes magnetic field components. The results have been compared to some si… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2002.09444v2-abstract-full').style.display = 'inline'; document.getElementById('2002.09444v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2002.09444v2-abstract-full" style="display: none;"> In this paper we present the analytical calculations to derive the magnetic field of a solenoid by solving exactly a fractional integral with the use of a novel method. Starting from the Biot-Savart law, we consider a coil of negligible thickness with a stationary electric current. We derive the expressions of the on and off-axes magnetic field components. The results have been compared to some simplified and known analytical formulae as well as to a commercial numerical code showing a good agreement. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2002.09444v2-abstract-full').style.display = 'none'; document.getElementById('2002.09444v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 February, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1805.08466">arXiv:1805.08466</a> <span> [<a href="https://arxiv.org/pdf/1805.08466">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1742-6596/1238/1/012061">10.1088/1742-6596/1238/1/012061 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Study of Collective Effects in the FCC-ee Collider </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Zobov%2C+M">Mikhail Zobov</a>, <a href="/search/physics?searchtype=author&query=Belli%2C+E">Eleonora Belli</a>, <a href="/search/physics?searchtype=author&query=Castorina%2C+G">Giovanni Castorina</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">Mauro Migliorati</a>, <a href="/search/physics?searchtype=author&query=Persichelli%2C+S">Serena Persichelli</a>, <a href="/search/physics?searchtype=author&query=Rumolo%2C+G">Giovanni Rumolo</a>, <a href="/search/physics?searchtype=author&query=Spataro%2C+B">Bruno Spataro</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1805.08466v1-abstract-short" style="display: inline;"> The Future Circular Collider (FCC) study aims at designing different options of a post-LHC collider. The high luminosity electron-positron collider FCC-ee based on the crab waist concept is considered as an intermediate step on the way towards FCC-hh, a 100 TeV hadron collider using the same tunnel of about 100 km. Due to a high intensity of circulating beams the impact of collective effects on FC… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.08466v1-abstract-full').style.display = 'inline'; document.getElementById('1805.08466v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1805.08466v1-abstract-full" style="display: none;"> The Future Circular Collider (FCC) study aims at designing different options of a post-LHC collider. The high luminosity electron-positron collider FCC-ee based on the crab waist concept is considered as an intermediate step on the way towards FCC-hh, a 100 TeV hadron collider using the same tunnel of about 100 km. Due to a high intensity of circulating beams the impact of collective effects on FCC-ee performance has to be carefully analyzed. In this paper we evaluate beam coupling impedance of the FCC-ee vacuum chamber, estimate thresholds and rise times of eventual single- and multibunch beam instabilities and discuss possible measures to mitigate them. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.08466v1-abstract-full').style.display = 'none'; document.getElementById('1805.08466v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 May, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Talk at the LaPlas-2018 Conference, NRNU MEPhI, 30 January-01 February 2018, Moscow, Russia. 6 pages, 3 figures, 2 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1609.03495">arXiv:1609.03495</a> <span> [<a href="https://arxiv.org/pdf/1609.03495">pdf</a>, <a href="https://arxiv.org/format/1609.03495">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Single beam collective effects in FCC-ee due to beam coupling impedance </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Belli%2C+E">Eleonora Belli</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">Mauro Migliorati</a>, <a href="/search/physics?searchtype=author&query=Persichelli%2C+S">Serena Persichelli</a>, <a href="/search/physics?searchtype=author&query=Zobov%2C+M">Mikhail Zobov</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1609.03495v1-abstract-short" style="display: inline;"> The Future Circular Collider study, hosted by CERN to design post-LHC particle accelerator options in a worldwide context, is focused on proton-proton high-energy and electron-positron high-luminosity frontier machines. This new accelerator complex represents a great challenge under several aspects, which involve R&D on beam dynamics and new technologies. One very critical point in this context is… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.03495v1-abstract-full').style.display = 'inline'; document.getElementById('1609.03495v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1609.03495v1-abstract-full" style="display: none;"> The Future Circular Collider study, hosted by CERN to design post-LHC particle accelerator options in a worldwide context, is focused on proton-proton high-energy and electron-positron high-luminosity frontier machines. This new accelerator complex represents a great challenge under several aspects, which involve R&D on beam dynamics and new technologies. One very critical point in this context is represented by collective effects, generated by the interaction of the beam with self-induced electromagnetic fields, called wake fields, which could produce beam instabilities, thus reducing the machines performance and limiting the maximum stored current. It is therefore very important to be able to predict these effects and to study in detail potential solutions to counteract them. In this paper the resistive wall and some other important geometrical sources of impedance for the FCC electron-positron accelera- tor are identified and evaluated, and their impact on the beam dynamics, which in some cases could lead to unwanted instabilities, is discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.03495v1-abstract-full').style.display = 'none'; document.getElementById('1609.03495v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 September, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2016. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1601.05216">arXiv:1601.05216</a> <span> [<a href="https://arxiv.org/pdf/1601.05216">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.5170/CERN-2014-009.357">10.5170/CERN-2014-009.357 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Wakefields and Instabilities in Linear Accelerators </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ferrario%2C+M">M. Ferrario</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">M. Migliorati</a>, <a href="/search/physics?searchtype=author&query=Palumbo%2C+L">L. Palumbo</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1601.05216v1-abstract-short" style="display: inline;"> When a charged particle travels across the vacuum chamber of an accelerator, it induces electromagnetic fields, which are left mainly behind the generating particle. These electromagnetic fields act back on the beam and influence its motion. Such an interaction of the beam with its surro undings results in beam energy losses, alters the shape of the bunches, and shifts the betatron and synchrotron… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.05216v1-abstract-full').style.display = 'inline'; document.getElementById('1601.05216v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1601.05216v1-abstract-full" style="display: none;"> When a charged particle travels across the vacuum chamber of an accelerator, it induces electromagnetic fields, which are left mainly behind the generating particle. These electromagnetic fields act back on the beam and influence its motion. Such an interaction of the beam with its surro undings results in beam energy losses, alters the shape of the bunches, and shifts the betatron and synchrotron frequencies. At high beam current the fields can even lead to instabilities, thus limiting the performance of the accelerator in terms of beam quality and current intensity. We discuss in this lecture the general features of the electromagnetic fields, introducing the concepts of wakefields and giving a few simple examples in cylindrical geometry. We then show the effect of the wakefields on the dynamics of a beam in a linac, dealing in particular with the beam breakup instability and how to cure it. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.05216v1-abstract-full').style.display = 'none'; document.getElementById('1601.05216v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 January, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, contribution to the CAS - CERN Accelerator School: Advanced Accelerator Physics Course, Trondheim, Norway, 18-29 Aug 2013</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN Yellow Report CERN-2014-009, pp.357-375 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1601.05214">arXiv:1601.05214</a> <span> [<a href="https://arxiv.org/pdf/1601.05214">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.5170/CERN-2014-009.331">10.5170/CERN-2014-009.331 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Space Charge Effects </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ferrario%2C+M">M. Ferrario</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">M. Migliorati</a>, <a href="/search/physics?searchtype=author&query=Palumbo%2C+L">L. Palumbo</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1601.05214v1-abstract-short" style="display: inline;"> The space charge forces are those generated directly by the charge distribution, with the inclusion of the image charges and currents due to the interaction of the beam with a perfectly conducting smooth pipe. Space charge forces are responsible for several unwanted phenomena related to beam dynamics, such as energy loss, shift of the synchronous phase and frequency, shift of the betatron frequenc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.05214v1-abstract-full').style.display = 'inline'; document.getElementById('1601.05214v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1601.05214v1-abstract-full" style="display: none;"> The space charge forces are those generated directly by the charge distribution, with the inclusion of the image charges and currents due to the interaction of the beam with a perfectly conducting smooth pipe. Space charge forces are responsible for several unwanted phenomena related to beam dynamics, such as energy loss, shift of the synchronous phase and frequency, shift of the betatron frequencies, and instabilities. We will discuss in this lecture the main feature of space charge effects in high-energy storage rings as well as in low-energy linacs and transport lines. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.05214v1-abstract-full').style.display = 'none'; document.getElementById('1601.05214v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 January, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">26 pages, contribution to the CAS - CERN Accelerator School: Advanced Accelerator Physics Course, Trondheim, Norway, 18-29 Aug 2013</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN Yellow Report CERN-2014-009, pp.331-356 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1508.03363">arXiv:1508.03363</a> <span> [<a href="https://arxiv.org/pdf/1508.03363">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Status and Challenges for FCC-ee </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Benedikt%2C+M">Michael Benedikt</a>, <a href="/search/physics?searchtype=author&query=Oide%2C+K">Katsunobu Oide</a>, <a href="/search/physics?searchtype=author&query=Zimmermann%2C+F">Frank Zimmermann</a>, <a href="/search/physics?searchtype=author&query=Bogomyagkov%2C+A">Anton Bogomyagkov</a>, <a href="/search/physics?searchtype=author&query=Levichev%2C+E">Eugene Levichev</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">Mauro Migliorati</a>, <a href="/search/physics?searchtype=author&query=Wienands%2C+U">Uli Wienands</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1508.03363v1-abstract-short" style="display: inline;"> We report the design status and beam dynamics challenges for the electron-positron branch of the Future Circular Collider (FCC) study, as of August 2015. After recalling motivation and physics requirements for the FCC-ee, we briefly discuss configurations and parameters, collider layout, the superconducting RF system, possible staging scenarios, final-focus optics, interaction-region (IR) issues,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.03363v1-abstract-full').style.display = 'inline'; document.getElementById('1508.03363v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1508.03363v1-abstract-full" style="display: none;"> We report the design status and beam dynamics challenges for the electron-positron branch of the Future Circular Collider (FCC) study, as of August 2015. After recalling motivation and physics requirements for the FCC-ee, we briefly discuss configurations and parameters, collider layout, the superconducting RF system, possible staging scenarios, final-focus optics, interaction-region (IR) issues, machine detector interface and IR synchrotron radiation, dynamic aperture, beam-beam effects, top-up injection, mono-chromatization option, impedances, instabilities, energy calibration and polarization, and SuperKEKB as a key demonstrator, before presenting conclusions and outlook. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.03363v1-abstract-full').style.display = 'none'; document.getElementById('1508.03363v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 August, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Combination of two articles invited for the ICFA Beam Dynamics Newsletter, September 2015 issue</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1407.3669">arXiv:1407.3669</a> <span> [<a href="https://arxiv.org/pdf/1407.3669">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Technical Design Report EuroGammaS proposal for the ELI-NP Gamma beam System </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Adriani%2C+O">O. Adriani</a>, <a href="/search/physics?searchtype=author&query=Albergo%2C+S">S. Albergo</a>, <a href="/search/physics?searchtype=author&query=Alesini%2C+D">D. Alesini</a>, <a href="/search/physics?searchtype=author&query=Anania%2C+M">M. Anania</a>, <a href="/search/physics?searchtype=author&query=Angal-Kalinin%2C+D">D. Angal-Kalinin</a>, <a href="/search/physics?searchtype=author&query=Antici%2C+P">P. Antici</a>, <a href="/search/physics?searchtype=author&query=Bacci%2C+A">A. Bacci</a>, <a href="/search/physics?searchtype=author&query=Bedogni%2C+R">R. Bedogni</a>, <a href="/search/physics?searchtype=author&query=Bellaveglia%2C+M">M. Bellaveglia</a>, <a href="/search/physics?searchtype=author&query=Biscari%2C+C">C. Biscari</a>, <a href="/search/physics?searchtype=author&query=Bliss%2C+N">N. Bliss</a>, <a href="/search/physics?searchtype=author&query=Boni%2C+R">R. Boni</a>, <a href="/search/physics?searchtype=author&query=Boscolo%2C+M">M. Boscolo</a>, <a href="/search/physics?searchtype=author&query=Broggi%2C+F">F. Broggi</a>, <a href="/search/physics?searchtype=author&query=Cardarelli%2C+P">P. Cardarelli</a>, <a href="/search/physics?searchtype=author&query=Cassou%2C+K">K. Cassou</a>, <a href="/search/physics?searchtype=author&query=Castellano%2C+M">M. Castellano</a>, <a href="/search/physics?searchtype=author&query=Catani%2C+L">L. Catani</a>, <a href="/search/physics?searchtype=author&query=Chaikovska%2C+I">I. Chaikovska</a>, <a href="/search/physics?searchtype=author&query=Chiadroni%2C+E">E. Chiadroni</a>, <a href="/search/physics?searchtype=author&query=Chiche%2C+R">R. Chiche</a>, <a href="/search/physics?searchtype=author&query=Cianchi%2C+A">A. Cianchi</a>, <a href="/search/physics?searchtype=author&query=Clarke%2C+J">J. Clarke</a>, <a href="/search/physics?searchtype=author&query=Clozza%2C+A">A. Clozza</a>, <a href="/search/physics?searchtype=author&query=Coppola%2C+M">M. Coppola</a> , et al. (84 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1407.3669v1-abstract-short" style="display: inline;"> The machine described in this document is an advanced Source of up to 20 MeV Gamma Rays based on Compton back-scattering, i.e. collision of an intense high power laser beam and a high brightness electron beam with maximum kinetic energy of about 720 MeV. Fully equipped with collimation and characterization systems, in order to generate, form and fully measure the physical characteristics of the pr… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1407.3669v1-abstract-full').style.display = 'inline'; document.getElementById('1407.3669v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1407.3669v1-abstract-full" style="display: none;"> The machine described in this document is an advanced Source of up to 20 MeV Gamma Rays based on Compton back-scattering, i.e. collision of an intense high power laser beam and a high brightness electron beam with maximum kinetic energy of about 720 MeV. Fully equipped with collimation and characterization systems, in order to generate, form and fully measure the physical characteristics of the produced Gamma Ray beam. The quality, i.e. phase space density, of the two colliding beams will be such that the emitted Gamma ray beam is characterized by energy tunability, spectral density, bandwidth, polarization, divergence and brilliance compatible with the requested performances of the ELI-NP user facility, to be built in Romania as the Nuclear Physics oriented Pillar of the European Extreme Light Infrastructure. This document illustrates the Technical Design finally produced by the EuroGammaS Collaboration, after a thorough investigation of the machine expected performances within the constraints imposed by the ELI-NP tender for the Gamma Beam System (ELI-NP-GBS), in terms of available budget, deadlines for machine completion and performance achievement, compatibility with lay-out and characteristics of the planned civil engineering. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1407.3669v1-abstract-full').style.display = 'none'; document.getElementById('1407.3669v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 July, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2014. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1307.7967">arXiv:1307.7967</a> <span> [<a href="https://arxiv.org/pdf/1307.7967">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> IRIDE White Book, An Interdisciplinary Research Infrastructure based on Dual Electron linacs&lasers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Alesini%2C+D">D. Alesini</a>, <a href="/search/physics?searchtype=author&query=Alessandroni%2C+M">M. Alessandroni</a>, <a href="/search/physics?searchtype=author&query=Anania%2C+M+P">M. P. Anania</a>, <a href="/search/physics?searchtype=author&query=Andreas%2C+S">S. Andreas</a>, <a href="/search/physics?searchtype=author&query=Angelone%2C+M">M. Angelone</a>, <a href="/search/physics?searchtype=author&query=Arcovito%2C+A">A. Arcovito</a>, <a href="/search/physics?searchtype=author&query=Arnesano%2C+F">F. Arnesano</a>, <a href="/search/physics?searchtype=author&query=Artioli%2C+M">M. Artioli</a>, <a href="/search/physics?searchtype=author&query=Avaldi%2C+L">L. Avaldi</a>, <a href="/search/physics?searchtype=author&query=Babusci%2C+D">D. Babusci</a>, <a href="/search/physics?searchtype=author&query=Bacci%2C+A">A. Bacci</a>, <a href="/search/physics?searchtype=author&query=Balerna%2C+A">A. Balerna</a>, <a href="/search/physics?searchtype=author&query=Bartalucci%2C+S">S. Bartalucci</a>, <a href="/search/physics?searchtype=author&query=Bedogni%2C+R">R. Bedogni</a>, <a href="/search/physics?searchtype=author&query=Bellaveglia%2C+M">M. Bellaveglia</a>, <a href="/search/physics?searchtype=author&query=Bencivenga%2C+F">F. Bencivenga</a>, <a href="/search/physics?searchtype=author&query=Benfatto%2C+M">M. Benfatto</a>, <a href="/search/physics?searchtype=author&query=Biedron%2C+S">S. Biedron</a>, <a href="/search/physics?searchtype=author&query=Bocci%2C+V">V. Bocci</a>, <a href="/search/physics?searchtype=author&query=Bolognesi%2C+M">M. Bolognesi</a>, <a href="/search/physics?searchtype=author&query=Bolognesi%2C+P">P. Bolognesi</a>, <a href="/search/physics?searchtype=author&query=Boni%2C+R">R. Boni</a>, <a href="/search/physics?searchtype=author&query=Bonifacio%2C+R">R. Bonifacio</a>, <a href="/search/physics?searchtype=author&query=Boscolo%2C+M">M. Boscolo</a>, <a href="/search/physics?searchtype=author&query=Boscherini%2C+F">F. Boscherini</a> , et al. (189 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1307.7967v1-abstract-short" style="display: inline;"> This report describes the scientific aims and potentials as well as the preliminary technical design of IRIDE, an innovative tool for multi-disciplinary investigations in a wide field of scientific, technological and industrial applications. IRIDE will be a high intensity 'particle factory', based on a combination of a high duty cycle radio-frequency superconducting electron linac and of high ener… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.7967v1-abstract-full').style.display = 'inline'; document.getElementById('1307.7967v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1307.7967v1-abstract-full" style="display: none;"> This report describes the scientific aims and potentials as well as the preliminary technical design of IRIDE, an innovative tool for multi-disciplinary investigations in a wide field of scientific, technological and industrial applications. IRIDE will be a high intensity 'particle factory', based on a combination of a high duty cycle radio-frequency superconducting electron linac and of high energy lasers. Conceived to provide unique research possibilities for particle physics, for condensed matter physics, chemistry and material science, for structural biology and industrial applications, IRIDE will open completely new research possibilities and advance our knowledge in many branches of science and technology. IRIDE will contribute to open new avenues of discoveries and to address most important riddles: What does matter consist of? What is the structure of proteins that have a fundamental role in life processes? What can we learn from protein structure to improve the treatment of diseases and to design more efficient drugs? But also how does an electronic chip behave under the effect of radiations? How can the heat flow in a large heat exchanger be optimized? The scientific potential of IRIDE is far reaching and justifies the construction of such a large facility in Italy in synergy with the national research institutes and companies and in the framework of the European and international research. It will impact also on R&D work for ILC, FEL, and will be complementarity to other large scale accelerator projects. IRIDE is also intended to be realized in subsequent stages of development depending on the assigned priorities. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.7967v1-abstract-full').style.display = 'none'; document.getElementById('1307.7967v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 July, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">270 pages</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1212.6203">arXiv:1212.6203</a> <span> [<a href="https://arxiv.org/pdf/1212.6203">pdf</a>, <a href="https://arxiv.org/format/1212.6203">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1674-1137/37/9/097005">10.1088/1674-1137/37/9/097005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Molybdenum sputtering film characterization for high gradient accelerating structures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bini%2C+S">S. Bini</a>, <a href="/search/physics?searchtype=author&query=Spataro%2C+B">B. Spataro</a>, <a href="/search/physics?searchtype=author&query=Marcelli%2C+A">A. Marcelli</a>, <a href="/search/physics?searchtype=author&query=Sarti%2C+S">S. Sarti</a>, <a href="/search/physics?searchtype=author&query=Dolgashev%2C+V+A">V. A. Dolgashev</a>, <a href="/search/physics?searchtype=author&query=Tantawi%2C+S">S. Tantawi</a>, <a href="/search/physics?searchtype=author&query=Yeremian%2C+A+D">A. D. Yeremian</a>, <a href="/search/physics?searchtype=author&query=Higashi%2C+Y">Y. Higashi</a>, <a href="/search/physics?searchtype=author&query=Grimaldi%2C+M+G">M. G. Grimaldi</a>, <a href="/search/physics?searchtype=author&query=Romano%2C+L">L. Romano</a>, <a href="/search/physics?searchtype=author&query=Ruffino%2C+F">F. Ruffino</a>, <a href="/search/physics?searchtype=author&query=Parodi%2C+R">R. Parodi</a>, <a href="/search/physics?searchtype=author&query=Cibin%2C+G">G. Cibin</a>, <a href="/search/physics?searchtype=author&query=Marrelli%2C+C">C. Marrelli</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">M. Migliorati</a>, <a href="/search/physics?searchtype=author&query=Caliendo%2C+C">C. Caliendo</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1212.6203v1-abstract-short" style="display: inline;"> Technological advancements are strongly required to fulfill the demands of new accelerator devices with the highest accelerating gradients and operation reliability for the future colliders. To this purpose an extensive R&D regarding molybdenum coatings on copper is in progress. In this contribution we describe chemical composition, deposition quality and resistivity properties of different molybd… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1212.6203v1-abstract-full').style.display = 'inline'; document.getElementById('1212.6203v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1212.6203v1-abstract-full" style="display: none;"> Technological advancements are strongly required to fulfill the demands of new accelerator devices with the highest accelerating gradients and operation reliability for the future colliders. To this purpose an extensive R&D regarding molybdenum coatings on copper is in progress. In this contribution we describe chemical composition, deposition quality and resistivity properties of different molybdenum coatings obtained via sputtering. The deposited films are thick metallic disorder layers with different resistivity values above and below the molibdenum dioxide reference value. Chemical and electrical properties of these sputtered coatings have been characterized by Rutherford backscattering, XANES and photoemission spectroscopy. We will also present a three cells standing wave section coated by a molybdenum layer $\sim$ 500 nm thick designed to improve the performance of X-Band accelerating systems. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1212.6203v1-abstract-full').style.display = 'none'; document.getElementById('1212.6203v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 December, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">manuscript has been submitted and accepted by Chinese Physics C (2012)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1112.3971">arXiv:1112.3971</a> <span> [<a href="https://arxiv.org/pdf/1112.3971">pdf</a>, <a href="https://arxiv.org/format/1112.3971">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Coupling of Laser-Generated Electrons with Conventional Accelerator Devices </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Antici%2C+P">P. Antici</a>, <a href="/search/physics?searchtype=author&query=Bacci%2C+A">A. Bacci</a>, <a href="/search/physics?searchtype=author&query=Benedetti%2C+C">C. Benedetti</a>, <a href="/search/physics?searchtype=author&query=Chiadroni%2C+E">E. Chiadroni</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+M">M. Ferrario</a>, <a href="/search/physics?searchtype=author&query=Lancia%2C+L">L. Lancia</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">M. Migliorati</a>, <a href="/search/physics?searchtype=author&query=Mostacci%2C+A">A. Mostacci</a>, <a href="/search/physics?searchtype=author&query=Palumbo%2C+L">L. Palumbo</a>, <a href="/search/physics?searchtype=author&query=Rossi%2C+A+R">A. R. Rossi</a>, <a href="/search/physics?searchtype=author&query=Serafini%2C+L">L. Serafini</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1112.3971v1-abstract-short" style="display: inline;"> Laser-based electron acceleration is attracting strong interest from the conventional accelerator community due to its outstanding characteristics in terms of high initial energy, low emittance and high beam current. Unfortunately, such beams are currently not comparable to those of conventional accelerators, limiting their use for the manifold applications that a traditional accelerator can have.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1112.3971v1-abstract-full').style.display = 'inline'; document.getElementById('1112.3971v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1112.3971v1-abstract-full" style="display: none;"> Laser-based electron acceleration is attracting strong interest from the conventional accelerator community due to its outstanding characteristics in terms of high initial energy, low emittance and high beam current. Unfortunately, such beams are currently not comparable to those of conventional accelerators, limiting their use for the manifold applications that a traditional accelerator can have. Besides working on the plasma source itself, a promising approach to shape the laser-generated beams is coupling them with conventional accelerator elements in order to benefit from both, a versatile electron source and a controllable beam. In this paper we show that some parameters commonly used by the particle accelerator community must be reconsidered when dealing with laser-plasma beams. Starting from the parameters of laser-generated electrons which can be obtained nowadays by conventional multi hundred TW laser systems, we compare different conventional magnetic lattices able to capture and transport those GeV electrons. From this comparison we highlight some important limit of the state-of-the-art plasma generated electrons with respect to conventional accelerator ones. Eventually we discuss an application of such beams in undulators for Free Electron Lasers (FELs), which is one of the most demanding applications in terms of beam quality. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1112.3971v1-abstract-full').style.display = 'none'; document.getElementById('1112.3971v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 December, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 15 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1011.4425">arXiv:1011.4425</a> <span> [<a href="https://arxiv.org/pdf/1011.4425">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.optcom.2010.11.052">10.1016/j.optcom.2010.11.052 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The FEL SASE operation, bunch compression and the beam heater </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Dattoli%2C+G">G. Dattoli</a>, <a href="/search/physics?searchtype=author&query=Labat%2C+M">M. Labat</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">M. Migliorati</a>, <a href="/search/physics?searchtype=author&query=Ottaviani%2C+P+L">P. L. Ottaviani</a>, <a href="/search/physics?searchtype=author&query=Pagnutti%2C+S">S. Pagnutti</a>, <a href="/search/physics?searchtype=author&query=Sabia%2C+E">E. Sabia</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1011.4425v1-abstract-short" style="display: inline;"> We discuss the conditions required for an optimal SASE FEL operation when bunch compression techniques are exploited to enhance the bunch peak current. We discuss the case of velocity bunching and magnetic bunch compression. With the reference to the latter technique we provide a quantitative estimate of the amount of laser heater power necessary to suppress the micro-bunching instability without… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1011.4425v1-abstract-full').style.display = 'inline'; document.getElementById('1011.4425v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1011.4425v1-abstract-full" style="display: none;"> We discuss the conditions required for an optimal SASE FEL operation when bunch compression techniques are exploited to enhance the bunch peak current. We discuss the case of velocity bunching and magnetic bunch compression. With the reference to the latter technique we provide a quantitative estimate of the amount of laser heater power necessary to suppress the micro-bunching instability without creating any problem to the SASE dynamics <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1011.4425v1-abstract-full').style.display = 'none'; document.getElementById('1011.4425v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 November, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2010. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/physics/0312072">arXiv:physics/0312072</a> <span> [<a href="https://arxiv.org/pdf/physics/0312072">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Bunch lengthening and microwave instability in the DAPhNE positron ring </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Zobov%2C+M">M. Zobov</a>, <a href="/search/physics?searchtype=author&query=Drago%2C+A">A. Drago</a>, <a href="/search/physics?searchtype=author&query=Gallo%2C+A">A. Gallo</a>, <a href="/search/physics?searchtype=author&query=Ghigo%2C+A">A. Ghigo</a>, <a href="/search/physics?searchtype=author&query=Marcellini%2C+F">F. Marcellini</a>, <a href="/search/physics?searchtype=author&query=Migliorati%2C+M">M. Migliorati</a>, <a href="/search/physics?searchtype=author&query=Palumbo%2C+L">L. Palumbo</a>, <a href="/search/physics?searchtype=author&query=Serio%2C+M">M. Serio</a>, <a href="/search/physics?searchtype=author&query=Vignola%2C+G">G. Vignola</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="physics/0312072v1-abstract-short" style="display: inline;"> We have performed bunch lengthening and microwave instability threshold measurements on the positron ring of the Frascati electron-positron Phi-factory DAPhNE. The results are in a good agreement with earlier analytical predictions and numerical simulations. </span> <span class="abstract-full has-text-grey-dark mathjax" id="physics/0312072v1-abstract-full" style="display: none;"> We have performed bunch lengthening and microwave instability threshold measurements on the positron ring of the Frascati electron-positron Phi-factory DAPhNE. The results are in a good agreement with earlier analytical predictions and numerical simulations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/0312072v1-abstract-full').style.display = 'none'; document.getElementById('physics/0312072v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 December, 2003; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2003. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">23 pages, 14 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DAFNE Technical Note: BM-3, 1998 </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a 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