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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/2411.17302">arXiv:2411.17302</a> <span> [<a href="https://arxiv.org/pdf/2411.17302">pdf</a>, <a href="https://arxiv.org/format/2411.17302">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Plasma Physics">physics.plasm-ph</span> <span class="tag is-small is-grey 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="Applied Physics">physics.app-ph</span> </div> </div> <p class="title is-5 mathjax"> All-optical compact setup for generation of collimated multi-MeV proton beams with a "snail" target </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bukharskii%2C+N">N. Bukharskii</a>, <a href="/search/physics?searchtype=author&query=Korneev%2C+P">Ph. Korneev</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="2411.17302v1-abstract-short" style="display: inline;"> The work considers an optical scheme for collimation of high-energy proton beams using $\sim 10^5$ T scale magnetic fields induced in a miniature "snail" target by petawatt or multi-petawatt laser irradiation in ps or fs regime. Such magnetic fields are known to be frozen into hot plasma and exist on at least a hundred of picoseconds time-scale, allowing their use for control of charged particle b… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.17302v1-abstract-full').style.display = 'inline'; document.getElementById('2411.17302v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.17302v1-abstract-full" style="display: none;"> The work considers an optical scheme for collimation of high-energy proton beams using $\sim 10^5$ T scale magnetic fields induced in a miniature "snail" target by petawatt or multi-petawatt laser irradiation in ps or fs regime. Such magnetic fields are known to be frozen into hot plasma and exist on at least a hundred of picoseconds time-scale, allowing their use for control of charged particle beams. The high values of the magnetic field along with the compact size perfectly match conditions for an all-in-one optical setup, where first, the laser beam accelerates protons, by, e.g. Target Normal Sheath Acceleration (TNSA) mechanism, and second, the closely positioned snail target is driven to guide the proton beam. An important issue is that the laser drivers for both proton acceleration schemes and the magnetic field generation in the considered targets may have the same properties, and even be parts of one splitted beam. Numerical simulations show that the considered setup can be used for efficient collimation of $\simeq 100$ MeV protons. The collimation effect weakly depends on the fine magnetic field structure and can be observed both for a simple magneto-dipole field profile and for a more complex coaxial-like profiles accounting for the intricate structure of electric currents in the interaction region. The obtained results are interesting for the development of intense laser-driven sources of charged particle beams with low divergence and high energy of accelerated particles. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.17302v1-abstract-full').style.display = 'none'; document.getElementById('2411.17302v1-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 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2304.07816">arXiv:2304.07816</a> <span> [<a href="https://arxiv.org/pdf/2304.07816">pdf</a>, <a href="https://arxiv.org/format/2304.07816">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Plasma Physics">physics.plasm-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> </div> </div> <p class="title is-5 mathjax"> Optical generation of quasi-stationary plasma electromagnetic structures for particle collimation with PetaWatt picosecond laser </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Korneev%2C+P">Ph. Korneev</a>, <a href="/search/physics?searchtype=author&query=Bukharskii%2C+N+D">N. D. Bukharskii</a>, <a href="/search/physics?searchtype=author&query=Kochetkov%2C+I+V">I. V. Kochetkov</a>, <a href="/search/physics?searchtype=author&query=Ehret%2C+M">M. Ehret</a>, <a href="/search/physics?searchtype=author&query=Santos%2C+J+J">J. J. Santos</a>, <a href="/search/physics?searchtype=author&query=Abe%2C+Y">Y. Abe</a>, <a href="/search/physics?searchtype=author&query=Law%2C+K+F+F">K. F. F. Law</a>, <a href="/search/physics?searchtype=author&query=Fujioka%2C+S">S. Fujioka</a>, <a href="/search/physics?searchtype=author&query=Schaumann%2C+G">G. Schaumann</a>, <a href="/search/physics?searchtype=author&query=Zielbauer%2C+B">B. Zielbauer</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="2304.07816v1-abstract-short" style="display: inline;"> Optical generation of energetic particle bunches requires high-power laser facilities operating in picosecond or femtosecond temporal domain. It is therefore preferable to use short laser pulses in all-optical platforms designed for guiding and focusing of such particle beams, increasing their brightness and decreasing their angular divergence. We propose and discuss theoretical and experimental r… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.07816v1-abstract-full').style.display = 'inline'; document.getElementById('2304.07816v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2304.07816v1-abstract-full" style="display: none;"> Optical generation of energetic particle bunches requires high-power laser facilities operating in picosecond or femtosecond temporal domain. It is therefore preferable to use short laser pulses in all-optical platforms designed for guiding and focusing of such particle beams, increasing their brightness and decreasing their angular divergence. We propose and discuss theoretical and experimental results for a novel electromagnetic guiding setup based on a shaped spiral-like 'snail' target with a relatively large useful aperture. Due to the diameter increased to a sub-mm scale, a wider particle bunches may be efficiently focused, as we show in theoretical modelling with a model field distributions, supported by the experimental data. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.07816v1-abstract-full').style.display = 'none'; document.getElementById('2304.07816v1-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 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/2210.14166">arXiv:2210.14166</a> <span> [<a href="https://arxiv.org/pdf/2210.14166">pdf</a>, <a href="https://arxiv.org/format/2210.14166">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Plasma Physics">physics.plasm-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/10.1063/5.0142083">10.1063/5.0142083 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Intense widely-controlled terahertz radiation from laser-driven wires </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bukharskii%2C+N">N. Bukharskii</a>, <a href="/search/physics?searchtype=author&query=Korneev%2C+P">Ph. Korneev</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="2210.14166v2-abstract-short" style="display: inline;"> Irradiation of a thin metallic wire with an intense femtosecond laser pulse creates a strong discharge wave that travels as a narrow pulse along the wire surface. The travelling discharge efficiently emits secondary radiation with spectral characteristics mostly defined by the wire geometry. Several exemplary designs are considered in the context of generation of intense terahertz radiation with c… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.14166v2-abstract-full').style.display = 'inline'; document.getElementById('2210.14166v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.14166v2-abstract-full" style="display: none;"> Irradiation of a thin metallic wire with an intense femtosecond laser pulse creates a strong discharge wave that travels as a narrow pulse along the wire surface. The travelling discharge efficiently emits secondary radiation with spectral characteristics mostly defined by the wire geometry. Several exemplary designs are considered in the context of generation of intense terahertz radiation with controllable characteristics for various scientific and technological applications. The proposed setup benefits by its robustness, versatility and high conversion efficiency of laser energy to terahertz radiation, which reaches several percent. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.14166v2-abstract-full').style.display = 'none'; document.getElementById('2210.14166v2-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> 27 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 25 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2110.00325">arXiv:2110.00325</a> <span> [<a href="https://arxiv.org/pdf/2110.00325">pdf</a>, <a href="https://arxiv.org/format/2110.00325">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Plasma Physics">physics.plasm-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-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/10.1063/5.0076700">10.1063/5.0076700 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Terahertz annular antenna driven with a short intense laser pulse </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bukharskii%2C+N">N. Bukharskii</a>, <a href="/search/physics?searchtype=author&query=Kochetkov%2C+I">Iu. Kochetkov</a>, <a href="/search/physics?searchtype=author&query=Korneev%2C+P">Ph. Korneev</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="2110.00325v3-abstract-short" style="display: inline;"> Generation of terahertz radiation by an oscillating discharge, excited with short laser pulses, may be controlled by geometry of the irradiated target. In this work, an annular target with a thin slit is considered as an efficient emitter of secondary radiation when driven by a short intense laser pulse. Under the irradiation, a slit works as a diode, which is quickly filled by dense plasma, closi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.00325v3-abstract-full').style.display = 'inline'; document.getElementById('2110.00325v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2110.00325v3-abstract-full" style="display: none;"> Generation of terahertz radiation by an oscillating discharge, excited with short laser pulses, may be controlled by geometry of the irradiated target. In this work, an annular target with a thin slit is considered as an efficient emitter of secondary radiation when driven by a short intense laser pulse. Under the irradiation, a slit works as a diode, which is quickly filled by dense plasma, closing the circuit for a travelling discharge pulse. Such a diode defines the discharge pulse propagation direction in a closed contour, enabling its multiple passes along the coil.The obtained oscillating charge efficiently generates terahertz waves with a maximum along the coil axis and controllable characteristics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.00325v3-abstract-full').style.display = 'none'; document.getElementById('2110.00325v3-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> 1 December, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 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/2012.09455">arXiv:2012.09455</a> <span> [<a href="https://arxiv.org/pdf/2012.09455">pdf</a>, <a href="https://arxiv.org/format/2012.09455">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Plasma Physics">physics.plasm-ph</span> </div> </div> <p class="title is-5 mathjax"> Ion acceleration by an ultrashort laser pulse interacting with a near-critical-density gas jet </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ehret%2C+M">M. Ehret</a>, <a href="/search/physics?searchtype=author&query=Salgado-Lopez%2C+C">C. Salgado-Lopez</a>, <a href="/search/physics?searchtype=author&query=Ospina-Bohorquez%2C+V">V. Ospina-Bohorquez</a>, <a href="/search/physics?searchtype=author&query=Perez-Hernandez%2C+J+A">J. A. Perez-Hernandez</a>, <a href="/search/physics?searchtype=author&query=Huault%2C+M">M. Huault</a>, <a href="/search/physics?searchtype=author&query=de+Marco%2C+M">M. de Marco</a>, <a href="/search/physics?searchtype=author&query=Apinaniz%2C+J+I">J. I. Apinaniz</a>, <a href="/search/physics?searchtype=author&query=Hannachi%2C+F">F. Hannachi</a>, <a href="/search/physics?searchtype=author&query=De+Luis%2C+D">D. De Luis</a>, <a href="/search/physics?searchtype=author&query=Toro%2C+J+H">J. Hernandez Toro</a>, <a href="/search/physics?searchtype=author&query=Arana%2C+D">D. Arana</a>, <a href="/search/physics?searchtype=author&query=Mendez%2C+C">C. Mendez</a>, <a href="/search/physics?searchtype=author&query=Varela%2C+O">O. Varela</a>, <a href="/search/physics?searchtype=author&query=Debayle%2C+A">A. Debayle</a>, <a href="/search/physics?searchtype=author&query=Gremillet%2C+L">L. Gremillet</a>, <a href="/search/physics?searchtype=author&query=Nguyen-Bui%2C+T+-">T. -H. Nguyen-Bui</a>, <a href="/search/physics?searchtype=author&query=Olivier%2C+E">E. Olivier</a>, <a href="/search/physics?searchtype=author&query=Revet%2C+G">G. Revet</a>, <a href="/search/physics?searchtype=author&query=Bukharskii%2C+N+D">N. D. Bukharskii</a>, <a href="/search/physics?searchtype=author&query=Larreur%2C+H">H. Larreur</a>, <a href="/search/physics?searchtype=author&query=Caron%2C+J">J. Caron</a>, <a href="/search/physics?searchtype=author&query=Vlachos%2C+C">C. Vlachos</a>, <a href="/search/physics?searchtype=author&query=Ceccotti%2C+T">T. Ceccotti</a>, <a href="/search/physics?searchtype=author&query=Raffestin%2C+D">D. Raffestin</a>, <a href="/search/physics?searchtype=author&query=Nicolai%2C+P">P. Nicolai</a> , et al. (6 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="2012.09455v1-abstract-short" style="display: inline;"> We demonstrate laser-driven Helium ion acceleration with cut-off energies above 25 MeV and peaked ion number above $10^8$ /MeV for 22(2) MeV projectiles from near-critical density gas jet targets. We employed shock gas jet nozzles at the high-repetition-rate (HRR) VEGA-2 laser system with 3 J in pulses of 30 fs focused down to intensities in the range between $9\times10^{19}$ W/cm$^2$ and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.09455v1-abstract-full').style.display = 'inline'; document.getElementById('2012.09455v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2012.09455v1-abstract-full" style="display: none;"> We demonstrate laser-driven Helium ion acceleration with cut-off energies above 25 MeV and peaked ion number above $10^8$ /MeV for 22(2) MeV projectiles from near-critical density gas jet targets. We employed shock gas jet nozzles at the high-repetition-rate (HRR) VEGA-2 laser system with 3 J in pulses of 30 fs focused down to intensities in the range between $9\times10^{19}$ W/cm$^2$ and $1.2\times10^{20}$ W/cm$^2$. We demonstrate acceleration spectra with minor shot-to-shot changes for small variations in the target gas density profile. Difference in gas profiles arise due to nozzles being exposed to a experimental environment, partially ablating and melting. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.09455v1-abstract-full').style.display = 'none'; document.getElementById('2012.09455v1-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 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">22 pages, 28 figures</span> </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> 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