| Summary: | Plasma Physics and Controlled Fusion
PAPER
Proton beam defocusing in AWAKE: comparison of simulations and measurements
A A Gorn1,2, M Turner3, E Adli4, R Agnello5, M Aladi6, Y Andrebe5, O Apsimon7,8, R Apsimon7,8, A-M Bachmann3,9,10, M A Baistrukov1,2Show full author list
Published 6 November 2020 • © 2020 IOP Publishing Ltd
Plasma Physics and Controlled Fusion, Volume 62, Number 12
Citation A A Gorn et al 2020 Plasma Phys. Control. Fusion 62 125023
80 Total downloads
Turn on MathJax
Get permission to re-use this article
Share this article
Share this content via email
Share on Facebook
Share on Twitter
Share on Google+
Share on Mendeley
Article information
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.
|
|---|