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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/2411.08681">arXiv:2411.08681</a> <span> [<a href="https://arxiv.org/pdf/2411.08681">pdf</a>, <a href="https://arxiv.org/format/2411.08681">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"> Measurement of the emittance of accelerated electron bunches at the AWAKE experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Cooke%2C+D+A">D. A. Cooke</a>, <a href="/search/physics?searchtype=author&query=Pannell%2C+F">F. Pannell</a>, <a href="/search/physics?searchtype=author&query=Della+Porta%2C+G+Z">G. Zevi Della Porta</a>, <a href="/search/physics?searchtype=author&query=Farmer%2C+J">J. Farmer</a>, <a href="/search/physics?searchtype=author&query=Bencini%2C+V">V. Bencini</a>, <a href="/search/physics?searchtype=author&query=Bergamaschi%2C+M">M. Bergamaschi</a>, <a href="/search/physics?searchtype=author&query=Mazzoni%2C+S">S. Mazzoni</a>, <a href="/search/physics?searchtype=author&query=Ranc%2C+L">L. Ranc</a>, <a href="/search/physics?searchtype=author&query=Senes%2C+E">E. Senes</a>, <a href="/search/physics?searchtype=author&query=Sherwood%2C+P">P. Sherwood</a>, <a href="/search/physics?searchtype=author&query=Wing%2C+M">M. Wing</a>, <a href="/search/physics?searchtype=author&query=Agnello%2C+R">R. Agnello</a>, <a href="/search/physics?searchtype=author&query=Ahdida%2C+C+C">C. C. Ahdida</a>, <a href="/search/physics?searchtype=author&query=Amoedo%2C+C">C. Amoedo</a>, <a href="/search/physics?searchtype=author&query=Andrebe%2C+Y">Y. Andrebe</a>, <a href="/search/physics?searchtype=author&query=Apsimon%2C+O">O. Apsimon</a>, <a href="/search/physics?searchtype=author&query=Apsimon%2C+R">R. Apsimon</a>, <a href="/search/physics?searchtype=author&query=Arnesano%2C+J+M">J. M. Arnesano</a>, <a href="/search/physics?searchtype=author&query=Blanchard%2C+P">P. Blanchard</a>, <a href="/search/physics?searchtype=author&query=Burrows%2C+P+N">P. N. Burrows</a>, <a href="/search/physics?searchtype=author&query=Buttensch%C3%B6n%2C+B">B. Buttensch枚n</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Chung%2C+M">M. Chung</a>, <a href="/search/physics?searchtype=author&query=Clairembaud%2C+A">A. Clairembaud</a>, <a href="/search/physics?searchtype=author&query=Davut%2C+C">C. Davut</a> , et al. (59 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="2411.08681v1-abstract-short" style="display: inline;"> The vertical plane transverse emittance of accelerated electron bunches at the AWAKE experiment at CERN has been determined, using three different methods of data analysis. This is a proof-of-principle measurement using the existing AWAKE electron spectrometer to validate the measurement technique. Large values of the geometric emittance, compared to that of the injection beam, are observed (… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.08681v1-abstract-full').style.display = 'inline'; document.getElementById('2411.08681v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.08681v1-abstract-full" style="display: none;"> The vertical plane transverse emittance of accelerated electron bunches at the AWAKE experiment at CERN has been determined, using three different methods of data analysis. This is a proof-of-principle measurement using the existing AWAKE electron spectrometer to validate the measurement technique. Large values of the geometric emittance, compared to that of the injection beam, are observed ($\sim \SI{0.5}{\milli\metre\milli\radian}$ compared with $\sim \SI{0.08}{\milli\metre\milli\radian}$), which is in line with expectations of emittance growth arising from plasma density ramps and large injection beam bunch size. Future iterations of AWAKE are anticipated to operate in conditions where emittance growth is better controlled, and the effects of the imaging systems of the existing and future spectrometer designs on the ability to measure the emittance are discussed. Good performance of the instrument down to geometric emittances of approximately $\SI{1e-4}{\milli\metre\milli\radian}$ is required, which may be possible with improved electron optics and imaging. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.08681v1-abstract-full').style.display = 'none'; document.getElementById('2411.08681v1-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 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2024. </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">20 pages, 9 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/2206.06040">arXiv:2206.06040</a> <span> [<a href="https://arxiv.org/pdf/2206.06040">pdf</a>, <a href="https://arxiv.org/format/2206.06040">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="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Plasma Physics">physics.plasm-ph</span> </div> </div> <p class="title is-5 mathjax"> The AWAKE Run 2 programme and beyond </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Gschwendtner%2C+E">Edda Gschwendtner</a>, <a href="/search/physics?searchtype=author&query=Lotov%2C+K">Konstantin Lotov</a>, <a href="/search/physics?searchtype=author&query=Muggli%2C+P">Patric Muggli</a>, <a href="/search/physics?searchtype=author&query=Wing%2C+M">Matthew Wing</a>, <a href="/search/physics?searchtype=author&query=Agnello%2C+R">Riccardo Agnello</a>, <a href="/search/physics?searchtype=author&query=Ahdida%2C+C+C">Claudia Christina Ahdida</a>, <a href="/search/physics?searchtype=author&query=Goncalves%2C+M+C+A">Maria Carolina Amoedo Goncalves</a>, <a href="/search/physics?searchtype=author&query=Andrebe%2C+Y">Yanis Andrebe</a>, <a href="/search/physics?searchtype=author&query=Apsimon%2C+O">Oznur Apsimon</a>, <a href="/search/physics?searchtype=author&query=Apsimon%2C+R">Robert Apsimon</a>, <a href="/search/physics?searchtype=author&query=Arnesano%2C+J+M">Jordan Matias Arnesano</a>, <a href="/search/physics?searchtype=author&query=Bachmann%2C+A">Anna-Maria Bachmann</a>, <a href="/search/physics?searchtype=author&query=Barrientos%2C+D">Diego Barrientos</a>, <a href="/search/physics?searchtype=author&query=Batsch%2C+F">Fabian Batsch</a>, <a href="/search/physics?searchtype=author&query=Bencini%2C+V">Vittorio Bencini</a>, <a href="/search/physics?searchtype=author&query=Bergamaschi%2C+M">Michele Bergamaschi</a>, <a href="/search/physics?searchtype=author&query=Blanchard%2C+P">Patrick Blanchard</a>, <a href="/search/physics?searchtype=author&query=Burrows%2C+P+N">Philip Nicholas Burrows</a>, <a href="/search/physics?searchtype=author&query=Buttensch%C3%B6n%2C+B">Birger Buttensch枚n</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A">Allen Caldwell</a>, <a href="/search/physics?searchtype=author&query=Chappell%2C+J">James Chappell</a>, <a href="/search/physics?searchtype=author&query=Chevallay%2C+E">Eric Chevallay</a>, <a href="/search/physics?searchtype=author&query=Chung%2C+M">Moses Chung</a>, <a href="/search/physics?searchtype=author&query=Cooke%2C+D+A">David Andrew Cooke</a>, <a href="/search/physics?searchtype=author&query=Damerau%2C+H">Heiko Damerau</a> , et al. (77 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="2206.06040v1-abstract-short" style="display: inline;"> Plasma wakefield acceleration is a promising technology to reduce the size of particle accelerators. Use of high energy protons to drive wakefields in plasma has been demonstrated during Run 1 of the AWAKE programme at CERN. Protons of energy 400 GeV drove wakefields that accelerated electrons to 2 GeV in under 10 m of plasma. The AWAKE collaboration is now embarking on Run 2 with the main aims to… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.06040v1-abstract-full').style.display = 'inline'; document.getElementById('2206.06040v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2206.06040v1-abstract-full" style="display: none;"> Plasma wakefield acceleration is a promising technology to reduce the size of particle accelerators. Use of high energy protons to drive wakefields in plasma has been demonstrated during Run 1 of the AWAKE programme at CERN. Protons of energy 400 GeV drove wakefields that accelerated electrons to 2 GeV in under 10 m of plasma. The AWAKE collaboration is now embarking on Run 2 with the main aims to demonstrate stable accelerating gradients of 0.5-1 GV/m, preserve emittance of the electron bunches during acceleration and develop plasma sources scalable to 100s of metres and beyond. By the end of Run 2, the AWAKE scheme should be able to provide electron beams for particle physics experiments and several possible experiments have already been evaluated. This article summarises the programme of AWAKE Run 2 and how it will be achieved as well as the possible application of the AWAKE scheme to novel particle physics experiments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.06040v1-abstract-full').style.display = 'none'; document.getElementById('2206.06040v1-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 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 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">21 pages, 8 figures. Submitted to Symmetry journal</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.12893">arXiv:2109.12893</a> <span> [<a href="https://arxiv.org/pdf/2109.12893">pdf</a>, <a href="https://arxiv.org/format/2109.12893">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="High Energy Physics - Experiment">hep-ex</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/10.1088/1748-0221/16/11/P11031">10.1088/1748-0221/16/11/P11031 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Analysis of Proton Bunch Parameters in the AWAKE Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Hafych%2C+V">V. Hafych</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Agnello%2C+R">R. Agnello</a>, <a href="/search/physics?searchtype=author&query=Ahdida%2C+C+C">C. C. Ahdida</a>, <a href="/search/physics?searchtype=author&query=Aladi%2C+M">M. Aladi</a>, <a href="/search/physics?searchtype=author&query=Goncalves%2C+M+C+A">M. C. Amoedo Goncalves</a>, <a href="/search/physics?searchtype=author&query=Andrebe%2C+Y">Y. Andrebe</a>, <a href="/search/physics?searchtype=author&query=Apsimon%2C+O">O. Apsimon</a>, <a href="/search/physics?searchtype=author&query=Apsimon%2C+R">R. Apsimon</a>, <a href="/search/physics?searchtype=author&query=Bachmann%2C+A+-">A. -M. Bachmann</a>, <a href="/search/physics?searchtype=author&query=Baistrukov%2C+M+A">M. A. Baistrukov</a>, <a href="/search/physics?searchtype=author&query=Batsch%2C+F">F. Batsch</a>, <a href="/search/physics?searchtype=author&query=Bergamaschi%2C+M">M. Bergamaschi</a>, <a href="/search/physics?searchtype=author&query=Blanchard%2C+P">P. Blanchard</a>, <a href="/search/physics?searchtype=author&query=Burrows%2C+P+N">P. N. Burrows</a>, <a href="/search/physics?searchtype=author&query=Buttensch%C3%B6n%2C+B">B. Buttensch枚n</a>, <a href="/search/physics?searchtype=author&query=Chappell%2C+J">J. Chappell</a>, <a href="/search/physics?searchtype=author&query=Chevallay%2C+E">E. Chevallay</a>, <a href="/search/physics?searchtype=author&query=Chung%2C+M">M. Chung</a>, <a href="/search/physics?searchtype=author&query=Cooke%2C+D+A">D. A. Cooke</a>, <a href="/search/physics?searchtype=author&query=Damerau%2C+H">H. Damerau</a>, <a href="/search/physics?searchtype=author&query=Davut%2C+C">C. Davut</a>, <a href="/search/physics?searchtype=author&query=Demeter%2C+G">G. Demeter</a>, <a href="/search/physics?searchtype=author&query=Dexter%2C+A">A. Dexter</a>, <a href="/search/physics?searchtype=author&query=Doebert%2C+S">S. Doebert</a> , et al. (63 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="2109.12893v1-abstract-short" style="display: inline;"> A precise characterization of the incoming proton bunch parameters is required to accurately simulate the self-modulation process in the Advanced Wakefield Experiment (AWAKE). This paper presents an analysis of the parameters of the incoming proton bunches used in the later stages of the AWAKE Run 1 data-taking period. The transverse structure of the bunch is observed at multiple positions along t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.12893v1-abstract-full').style.display = 'inline'; document.getElementById('2109.12893v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.12893v1-abstract-full" style="display: none;"> A precise characterization of the incoming proton bunch parameters is required to accurately simulate the self-modulation process in the Advanced Wakefield Experiment (AWAKE). This paper presents an analysis of the parameters of the incoming proton bunches used in the later stages of the AWAKE Run 1 data-taking period. The transverse structure of the bunch is observed at multiple positions along the beamline using scintillating or optical transition radiation screens. The parameters of a model that describes the bunch transverse dimensions and divergence are fitted to represent the observed data using Bayesian inference. The analysis is tested on simulated data and then applied to the experimental data. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.12893v1-abstract-full').style.display = 'none'; document.getElementById('2109.12893v1-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 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/2107.11369">arXiv:2107.11369</a> <span> [<a href="https://arxiv.org/pdf/2107.11369">pdf</a>, <a href="https://arxiv.org/format/2107.11369">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> </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/10.1103/PhysRevAccelBeams.24.101301">10.1103/PhysRevAccelBeams.24.101301 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Simulation and Experimental Study of Proton Bunch Self-Modulation in Plasma with Linear Density Gradients </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Guzm%C3%A1n%2C+P+I+M">P. I. Morales Guzm谩n</a>, <a href="/search/physics?searchtype=author&query=Muggli%2C+P">P. Muggli</a>, <a href="/search/physics?searchtype=author&query=Agnello%2C+R">R. Agnello</a>, <a href="/search/physics?searchtype=author&query=Ahdida%2C+C+C">C. C. Ahdida</a>, <a href="/search/physics?searchtype=author&query=Aladi%2C+M">M. Aladi</a>, <a href="/search/physics?searchtype=author&query=Goncalves%2C+M+C+A">M. C. Amoedo Goncalves</a>, <a href="/search/physics?searchtype=author&query=Andrebe%2C+Y">Y. Andrebe</a>, <a href="/search/physics?searchtype=author&query=Apsimon%2C+O">O. Apsimon</a>, <a href="/search/physics?searchtype=author&query=Apsimon%2C+R">R. Apsimon</a>, <a href="/search/physics?searchtype=author&query=Bachmann%2C+A+-">A. -M. Bachmann</a>, <a href="/search/physics?searchtype=author&query=Baistrukov%2C+M+A">M. A. Baistrukov</a>, <a href="/search/physics?searchtype=author&query=Batsch%2C+F">F. Batsch</a>, <a href="/search/physics?searchtype=author&query=Bergamaschi%2C+M">M. Bergamaschi</a>, <a href="/search/physics?searchtype=author&query=Blanchard%2C+P">P. Blanchard</a>, <a href="/search/physics?searchtype=author&query=Braunm%C3%BCller%2C+F">F. Braunm眉ller</a>, <a href="/search/physics?searchtype=author&query=Burrows%2C+P+N">P. N. Burrows</a>, <a href="/search/physics?searchtype=author&query=Buttensch%C3%B6n%2C+B">B. Buttensch枚n</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Chappell%2C+J">J. Chappell</a>, <a href="/search/physics?searchtype=author&query=Chevallay%2C+E">E. Chevallay</a>, <a href="/search/physics?searchtype=author&query=Chung%2C+M">M. Chung</a>, <a href="/search/physics?searchtype=author&query=Cooke%2C+D+A">D. A. Cooke</a>, <a href="/search/physics?searchtype=author&query=Damerau%2C+H">H. Damerau</a>, <a href="/search/physics?searchtype=author&query=Davut%2C+C">C. Davut</a>, <a href="/search/physics?searchtype=author&query=Demeter%2C+G">G. Demeter</a> , et al. (66 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="2107.11369v1-abstract-short" style="display: inline;"> We present numerical simulations and experimental results of the self-modulation of a long proton bunch in a plasma with linear density gradients along the beam path. Simulation results agree with the experimental results reported in arXiv:2007.14894v2: with negative gradients, the charge of the modulated bunch is lower than with positive gradients. In addition, the bunch modulation frequency vari… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.11369v1-abstract-full').style.display = 'inline'; document.getElementById('2107.11369v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2107.11369v1-abstract-full" style="display: none;"> We present numerical simulations and experimental results of the self-modulation of a long proton bunch in a plasma with linear density gradients along the beam path. Simulation results agree with the experimental results reported in arXiv:2007.14894v2: with negative gradients, the charge of the modulated bunch is lower than with positive gradients. In addition, the bunch modulation frequency varies with gradient. Simulation results show that dephasing of the wakefields with respect to the relativistic protons along the plasma is the main cause for the loss of charge. The study of the modulation frequency reveals details about the evolution of the self-modulation process along the plasma. In particular for negative gradients, the modulation frequency across time-resolved images of the bunch indicates the position along the plasma where protons leave the wakefields. Simulations and experimental results are in excellent agreement. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.11369v1-abstract-full').style.display = 'none'; document.getElementById('2107.11369v1-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, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">13 pages, 11 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Accel. Beams 24, 101301 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2012.09676">arXiv:2012.09676</a> <span> [<a href="https://arxiv.org/pdf/2012.09676">pdf</a>, <a href="https://arxiv.org/format/2012.09676">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> </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/10.1103/PhysRevLett.126.164802">10.1103/PhysRevLett.126.164802 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Transition between Instability and Seeded Self-Modulation of a Relativistic Particle Bunch in Plasma </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Batsch%2C+F">F. Batsch</a>, <a href="/search/physics?searchtype=author&query=Muggli%2C+P">P. Muggli</a>, <a href="/search/physics?searchtype=author&query=Agnello%2C+R">R. Agnello</a>, <a href="/search/physics?searchtype=author&query=Ahdida%2C+C+C">C. C. Ahdida</a>, <a href="/search/physics?searchtype=author&query=Goncalves%2C+M+C+A">M. C. Amoedo Goncalves</a>, <a href="/search/physics?searchtype=author&query=Andrebe%2C+Y">Y. Andrebe</a>, <a href="/search/physics?searchtype=author&query=Apsimon%2C+O">O. Apsimon</a>, <a href="/search/physics?searchtype=author&query=Apsimon%2C+R">R. Apsimon</a>, <a href="/search/physics?searchtype=author&query=Bachmann%2C+A+-">A. -M. Bachmann</a>, <a href="/search/physics?searchtype=author&query=Baistrukov%2C+M+A">M. A. Baistrukov</a>, <a href="/search/physics?searchtype=author&query=Blanchard%2C+P">P. Blanchard</a>, <a href="/search/physics?searchtype=author&query=Braunm%C3%BCller%2C+F">F. Braunm眉ller</a>, <a href="/search/physics?searchtype=author&query=Burrows%2C+P+N">P. N. Burrows</a>, <a href="/search/physics?searchtype=author&query=Buttensch%C3%B6n%2C+B">B. Buttensch枚n</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Chappell%2C+J">J. Chappell</a>, <a href="/search/physics?searchtype=author&query=Chevallay%2C+E">E. Chevallay</a>, <a href="/search/physics?searchtype=author&query=Chung%2C+M">M. Chung</a>, <a href="/search/physics?searchtype=author&query=Cooke%2C+D+A">D. A. Cooke</a>, <a href="/search/physics?searchtype=author&query=Damerau%2C+H">H. Damerau</a>, <a href="/search/physics?searchtype=author&query=Davut%2C+C">C. Davut</a>, <a href="/search/physics?searchtype=author&query=Demeter%2C+G">G. Demeter</a>, <a href="/search/physics?searchtype=author&query=Deubner%2C+H+L">H. L. Deubner</a>, <a href="/search/physics?searchtype=author&query=Doebert%2C+S">S. Doebert</a>, <a href="/search/physics?searchtype=author&query=Farmer%2C+J">J. Farmer</a> , et al. (72 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="2012.09676v1-abstract-short" style="display: inline;"> We use a relativistic ionization front to provide various initial transverse wakefield amplitudes for the self-modulation of a long proton bunch in plasma. We show experimentally that, with sufficient initial amplitude ($\ge(4.1\pm0.4)$ MV/m), the phase of the modulation along the bunch is reproducible from event to event, with 3 to 7% (of 2$蟺$) rms variations all along the bunch. The phase is not… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.09676v1-abstract-full').style.display = 'inline'; document.getElementById('2012.09676v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2012.09676v1-abstract-full" style="display: none;"> We use a relativistic ionization front to provide various initial transverse wakefield amplitudes for the self-modulation of a long proton bunch in plasma. We show experimentally that, with sufficient initial amplitude ($\ge(4.1\pm0.4)$ MV/m), the phase of the modulation along the bunch is reproducible from event to event, with 3 to 7% (of 2$蟺$) rms variations all along the bunch. The phase is not reproducible for lower initial amplitudes. We observe the transition between these two regimes. Phase reproducibility is essential for deterministic external injection of particles to be accelerated. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.09676v1-abstract-full').style.display = 'none'; document.getElementById('2012.09676v1-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">Letter and Supplemental Material, 6 figures, 8 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 126, 164802 (2021) </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> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg> <a href="https://info.arxiv.org/help/contact.html"> Contact</a> </li> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>subscribe to arXiv mailings</title><desc>Click here to subscribe</desc><path d="M476 3.2L12.5 270.6c-18.1 10.4-15.8 35.6 2.2 43.2L121 358.4l287.3-253.2c5.5-4.9 13.3 2.6 8.6 8.3L176 407v80.5c0 23.6 28.5 32.9 42.5 15.8L282 426l124.6 52.2c14.2 6 30.4-2.9 33-18.2l72-432C515 7.8 493.3-6.8 476 3.2z"/></svg> <a href="https://info.arxiv.org/help/subscribe"> Subscribe</a> </li> </ul> </div> </div> </div>   <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/license/index.html">Copyright</a></li> <li><a href="https://info.arxiv.org/help/policies/privacy_policy.html">Privacy Policy</a></li> </ul> </div> <div class="column sorry-app-links"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/web_accessibility.html">Web Accessibility Assistance</a></li> <li> <p class="help"> <a class="a11y-main-link" href="https://status.arxiv.org" target="_blank">arXiv Operational Status <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 512" class="icon filter-dark_grey" role="presentation"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z"/></svg></a><br> Get status notifications via <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/email/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg>email</a> or <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/slack/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512" class="icon filter-black" role="presentation"><path d="M94.12 315.1c0 25.9-21.16 47.06-47.06 47.06S0 341 0 315.1c0-25.9 21.16-47.06 47.06-47.06h47.06v47.06zm23.72 0c0-25.9 21.16-47.06 47.06-47.06s47.06 21.16 47.06 47.06v117.84c0 25.9-21.16 47.06-47.06 47.06s-47.06-21.16-47.06-47.06V315.1zm47.06-188.98c-25.9 0-47.06-21.16-47.06-47.06S139 32 164.9 32s47.06 21.16 47.06 47.06v47.06H164.9zm0 23.72c25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06H47.06C21.16 243.96 0 222.8 0 196.9s21.16-47.06 47.06-47.06H164.9zm188.98 47.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06h-47.06V196.9zm-23.72 0c0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06V79.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06V196.9zM283.1 385.88c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06v-47.06h47.06zm0-23.72c-25.9 0-47.06-21.16-47.06-47.06 0-25.9 21.16-47.06 47.06-47.06h117.84c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06H283.1z"/></svg>slack</a> </p> </li> </ul> </div> </div> </div>  </div> </footer> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/member_acknowledgement.js"></script> </body> </html>

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