Proton beam defocusing in AWAKE: comparison of simulations and measurements
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Published:2020-11-06
Issue:12
Volume:62
Page:125023
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ISSN:0741-3335
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Container-title:Plasma Physics and Controlled Fusion
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language:
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Short-container-title:Plasma Phys. Control. Fusion
Author:
Gorn A AORCID, Turner MORCID, Adli E, Agnello R, Aladi M, Andrebe Y, Apsimon O, Apsimon R, Bachmann A-M, Baistrukov M A, Batsch F, Bergamaschi M, Blanchard P, Burrows P N, Buttenschön B, Caldwell A, Chappell J, Chevallay E, Chung M, Cooke D A, Damerau H, Davut C, Demeter G, Deubner L H, Dexter A, Djotyan G P, Doebert S, Farmer J, Fasoli A, Fedosseev V N, Fiorito R, Fonseca R A, Friebel F, Furno I, Garolfi L, Gessner S, Goddard B, Gorgisyan I, Granados E, Granetzny M, Grulke O, Gschwendtner E, Hafych V, Hartin A, Helm A, Henderson J R, Howling A, Hüther M, Jacquier R, Kargapolov I Yu, Kedves M Á, Keeble F, Kelisani M D, Kim S-Y, Kraus F, Krupa M, Lefevre T, Liang L, Liu S, Lopes N, Lotov K VORCID, Martyanov M, Mazzoni S, Medina Godoy D, Minakov V A, Moody J T, Morales Guzmán P I, Moreira M, Nechaeva T, Panuganti H, Pardons A, Peña Asmus F, Perera A, Petrenko A, Pucek J, Pukhov A, Ráczkevi B, Ramjiawan R L, Rey S, Ruhl H, Saberi H, Schmitz O, Senes E, Sherwood P, Silva L O, Spitsyn R I, Tuev P V, Velotti F, Verra L, Verzilov V A, Vieira J, Welsch C P, Williamson B, Wing M, Wolfenden J, Woolley B, Xia G, Zepp M, Zevi Della Porta G
Abstract
Abstract
In 2017, AWAKE demonstrated the seeded self-modulation (SSM) of a 400 GeV proton beam from the Super Proton Synchrotron at CERN. The angular distribution of the protons deflected due to SSM is a quantitative measure of the process, which agrees with simulations by the two-dimensional (axisymmetric) particle-in-cell code LCODE to about 5%. The agreement is achieved in beam population scans at two selected plasma densities and in the scan of longitudinal plasma density gradient. The agreement is reached only in the case of a wide enough simulation box (several plasma wavelengths) that is closer to experimental conditions, but requires more computational power. Therefore, particle-in-cell codes can be used to interpret the SSM physics underlying the experimental data.
Funder
Research Council of Norway Russian Foundation for Basic Research Natural Sciences and Engineering Research Council of Canada CNRC Portuguese Foundation for Science and Technology Basis Foundation Leverhulme Trust Wolfgang Gentner Programme of the German Federal Ministry of Education and Research U.S. National Science Foundation Alexander von Humboldt Stiftung Wigner Datacenter Cloud facility European Union’s Framework Programme for Research and Innovation Horizon 2020, Marie Sklodowska-Curie Grant Science and Technology Facilities Council Deutsche Forschungsgemeinschaft National Research Foundation of Korea
Subject
Condensed Matter Physics,Nuclear Energy and Engineering
Cited by
8 articles.
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