https://doi.org/10.1140/epjp/s13360-025-06868-y
Regular Article
Stimulated Raman scattering in laser plasma with non-thermal electron distribution
1
School of physics and technology, Nantong University, 226001, Nantong, Jiangsu, China
2
Xinglin College, Nantong University, 226236, Nantong, Jiangsu, China
Received:
29
June
2025
Accepted:
14
September
2025
Published online:
29
September
2025
The threshold and growth rate of stimulated Raman scattering (SRS) in laser plasma with super-Gaussian-Maxwellian (SGM) distributed electrons are investigated based on the nonlinear dispersion relation derived from kinetic theory. The differences in SRS characteristics among electrons following the SGM, Maxwellian, and super-Gaussian distributions under the same effective kinetic temperature are analyzed numerically using experimental parameters. It is found that the SRS threshold increases with electron density. The threshold for Maxwellian-distributed electrons is significantly higher than that for super-Gaussian-distributed electrons and considerably lower than that for SGM-distributed electrons. When the incident laser intensity is weak, the electron density corresponding to the maximum growth rate increases with laser intensity and is highest for SGM-distributed electrons. However, when the incident laser intensity is sufficiently strong, the growth rate of SRS increases with electron density and reaches its maximum at one-fourth of the critical electron density. The growth rate for electrons with an SGM distribution is slightly higher than those for the other two distributions. These results are conducive to the understanding of SRS properties in laser-plasma interactions.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
