dorsal/arxiv
View SchemaVlasov Simulations of Trapping and Inhomogeneity in Raman Scattering
| Authors | D. J. Strozzi, M. M. Shoucri, A. Bers, E. A. Williams, A. B. Langdon |
|---|---|
| Categories | |
| ArXiv ID | physics/0508106 |
| URL | https://arxiv.org/abs/physics/0508106 |
| DOI | 10.1017/S0022377806005599 |
| Journal | Journ. Plasma Physics 72 part 6, 1299 (2006) |
Abstract
We study stimulated Raman scattering (SRS) in laser-fusion conditions with the Eulerian Vlasov code ELVIS. Back SRS from homogeneous plasmas occurs in sub-picosecond bursts and far exceeds linear theory. Forward SRS and re-scatter of back SRS are also observed. The plasma wave frequency downshifts from the linear dispersion curve, and the electron distribution shows flattening. This is consistent with trapping and reduces the Landau damping. There is some acoustic ($\omega\propto k$) activity and possibly electron acoustic scatter. Kinetic ions do not affect SRS for early times but suppress it later on. SRS from inhomogeneous plasmas exhibits a kinetic enhancement for long density scale lengths. More scattering results when the pump propagates to higher as opposed to lower density.
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"abstract": "We study stimulated Raman scattering (SRS) in laser-fusion conditions with\nthe Eulerian Vlasov code ELVIS. Back SRS from homogeneous plasmas occurs in\nsub-picosecond bursts and far exceeds linear theory. Forward SRS and re-scatter\nof back SRS are also observed. The plasma wave frequency downshifts from the\nlinear dispersion curve, and the electron distribution shows flattening. This\nis consistent with trapping and reduces the Landau damping. There is some\nacoustic ($\\omega\\propto k$) activity and possibly electron acoustic scatter.\nKinetic ions do not affect SRS for early times but suppress it later on. SRS\nfrom inhomogeneous plasmas exhibits a kinetic enhancement for long density\nscale lengths. More scattering results when the pump propagates to higher as\nopposed to lower density.",
"arxiv_id": "physics/0508106",
"authors": [
"D. J. Strozzi",
"M. M. Shoucri",
"A. Bers",
"E. A. Williams",
"A. B. Langdon"
],
"categories": [
"physics.plasm-ph"
],
"doi": "10.1017/S0022377806005599",
"journal_ref": "Journ. Plasma Physics 72 part 6, 1299 (2006)",
"title": "Vlasov Simulations of Trapping and Inhomogeneity in Raman Scattering",
"url": "https://arxiv.org/abs/physics/0508106"
},
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