Journal article
Simulation and experimental study of proton bunch self-modulation in plasma with linear density gradients
- Abstract:
- 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 [F. Braunmller, T. Nechaeva et al. (AWAKE Collaboration), Phys. Rev. Lett. 125, 264801 (2020)]: 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.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, 2.1MB, Terms of use)
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- Publisher copy:
- 10.1103/PhysRevAccelBeams.24.101301
- Publisher:
- American Physical Society
- Journal:
- Physical Review Accelerators and Beams More from this journal
- Volume:
- 24
- Issue:
- 10
- Article number:
- 101301
- Publication date:
- 2021-10-01
- Acceptance date:
- 2021-08-30
- DOI:
- EISSN:
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2469-9888
- Language:
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English
- Keywords:
- Pubs id:
-
1205997
- Local pid:
-
pubs:1205997
- Deposit date:
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2021-10-29
Terms of use
- Copyright holder:
- Guzmán et al.
- Copyright date:
- 2021
- Rights statement:
- Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Open access publication funded by the Max Planck Society.
- Licence:
- CC Attribution (CC BY)
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