Gorn, AA;
Turner, M;
Adli, E;
Agnello, R;
Aladi, M;
Andrebe, Y;
Apsimon, O;
... Porta, GZD; + view all
(2020)
Proton beam defocusing in AWAKE: comparison of simulations and measurements.
Plasma Physics and Controlled Fusion
, 62
(12)
, Article 125023. 10.1088/1361-6587/abc298.
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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.
| Type: | Article |
|---|---|
| Title: | Proton beam defocusing in AWAKE: comparison of simulations and measurements |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1361-6587/abc298 |
| Publisher version: | https://doi.org/10.1088/1361-6587/abc298 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS UCL UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10153143 |
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