Journal article
Modulational instability in large-amplitude linear laser wakefields
- Abstract:
- We investigate the growth of ion density perturbations in large-amplitude linear laser wakefields via two-dimensional particle-in-cell simulations. Growth rates and wave numbers are found to be consistent with a longitudinal strong-field modulational instability (SFMI). We examine the transverse dependence of the instability for a Gaussian wakefield envelope and show that growth rates and wavenumbers can be maximised off-axis. On-axis growth rates are found to decrease with increasing ion mass or electron temperature. These results are in close agreement with the dispersion relation of a Langmuir wave with energy density that is large compared to the plasma thermal energy density. The implications for wakefield accelerators, in particular multi-pulse schemes, are discussed.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 1.1MB, Terms of use)
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- Publisher copy:
- 10.1103/PhysRevE.107.L023201
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review E More from this journal
- Volume:
- 107
- Article number:
- L023201
- Publication date:
- 2023-02-22
- Acceptance date:
- 2022-11-15
- DOI:
- EISSN:
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2470-0053
- ISSN:
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2470-0045
- Language:
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English
- Keywords:
- Pubs id:
-
1328250
- Local pid:
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pubs:1328250
- Deposit date:
-
2023-02-10
Terms of use
- Copyright holder:
- American Physical Society
- Copyright date:
- 2023
- Rights statement:
- © 2023 American Physical Society
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