Journal article
Development of the self-modulation instability of a relativistic proton bunch in plasma
- Abstract:
- Self-modulation is a beam-plasma instability that is useful to drive large-amplitude wakefields with bunches much longer than the plasma skin depth. We present experimental results showing that, when increasing the ratio between the initial transverse size of the bunch and the plasma skin depth, the instability occurs later along the bunch, or not at all, over a fixed plasma length, because the amplitude of the initial wakefields decreases. We show cases for which self-modulation does not develop and we introduce a simple model discussing the conditions for which it would not occur after any plasma length. Changing bunch size and plasma electron density also changes the growth rate of the instability. We discuss the impact of these results on the design of a particle accelerator based on the self-modulation instability seeded by a relativistic ionization front, such as the future upgrade of the AWAKE experiment.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 4.1MB, Terms of use)
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- Publisher copy:
- 10.1063/5.0157391
Authors
+ Science and Technology Facilities Council
More from this funder
- Grant:
- ST/T001933/1
- ST/P002048/1
- PP/E002862/1
- ST/T001860/1
- ST/X005518/1
- ST/V001655/1
- ST/J000744/1
- ST/P003699/1
- ST/G502512/1
+ UK Research and Innovation/ Marie Sklodowska Curie Actions
More from this funder
- Grant:
- EP/Y000617/1
- Publisher:
- AIP Publishing
- Journal:
- Physics of Plasmas More from this journal
- Volume:
- 30
- Article number:
- 083104
- Publication date:
- 2023-08-08
- Acceptance date:
- 2023-07-15
- DOI:
- EISSN:
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1089-7674
- ISSN:
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1070-664X
- Language:
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English
- Keywords:
- Pubs id:
-
1517664
- Local pid:
-
pubs:1517664
- Deposit date:
-
2023-08-30
- ARK identifier:
Terms of use
- Copyright holder:
- Verra et al
- Copyright date:
- 2023
- Rights statement:
- © 2023 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
- Notes:
- This is the accepted manuscript version of the article. The final version will be available online from a forthcoming edition of Physics of Plasma.
- Licence:
- CC Attribution (CC BY)
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