On stimulated scattering of laser light in inertial fusion energy targets
Abstract
Propagation of a laser light through regions of an underdense plasma is an active research topic in laser fusion. In particular, a large effort has been invested in studies of stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS), which can reflect laser energy and produce energetic particles to preheat a fusion energy target. Experiments, theory, and simulations agree on a complex interplay between various laser-plasma instabilities. By particle-in-cell simulations of an underdense electron plasma, apart from the standard SRS, a strong backscattering was found near the electron plasma frequency at densities beyond the quarter critical. This novel instability, recognized in recent experiments as stimulated laser scattering on a trapped electron-acoustic mode (SEAS), is absent from a classical theory of laser-parametric instabilities. A parametric excitation of SEAS instability is explained by a three-wave resonant decay of the incident laser light into a standing ...backscattered wave and a slow trapped electron-acoustic wave (omega LT omega(p)). Large SEAS pulsations, eventually suppressed by relativistic heating of electrons, are observed in these simulations. This phenomenon seems relevant to future hohlraum target and fast ignition experiments.
Keywords:
laser fusion / IFE targets / stimulated scatteringSource:
Fusion Science and Technology, 2003, 43, 3, 359-365Note:
- 2nd International-Atomic-Energy-Agency Technical Meeting, Jun 17-19, 2002, San Diego, CA
DOI: 10.13182/FST03-A279
ISSN: 1536-1055
WoS: 000182229000017
Scopus: 2-s2.0-0038639062
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Institution/Community
VinčaTY - JOUR AU - Nikolić, Ljubomir AU - Škorić, Miloš M. AU - Ishiguro, Seiji AU - Sato, Tetsuya PY - 2003 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6361 AB - Propagation of a laser light through regions of an underdense plasma is an active research topic in laser fusion. In particular, a large effort has been invested in studies of stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS), which can reflect laser energy and produce energetic particles to preheat a fusion energy target. Experiments, theory, and simulations agree on a complex interplay between various laser-plasma instabilities. By particle-in-cell simulations of an underdense electron plasma, apart from the standard SRS, a strong backscattering was found near the electron plasma frequency at densities beyond the quarter critical. This novel instability, recognized in recent experiments as stimulated laser scattering on a trapped electron-acoustic mode (SEAS), is absent from a classical theory of laser-parametric instabilities. A parametric excitation of SEAS instability is explained by a three-wave resonant decay of the incident laser light into a standing backscattered wave and a slow trapped electron-acoustic wave (omega LT omega(p)). Large SEAS pulsations, eventually suppressed by relativistic heating of electrons, are observed in these simulations. This phenomenon seems relevant to future hohlraum target and fast ignition experiments. T2 - Fusion Science and Technology T1 - On stimulated scattering of laser light in inertial fusion energy targets VL - 43 IS - 3 SP - 359 EP - 365 DO - 10.13182/FST03-A279 ER -
@article{ author = "Nikolić, Ljubomir and Škorić, Miloš M. and Ishiguro, Seiji and Sato, Tetsuya", year = "2003", abstract = "Propagation of a laser light through regions of an underdense plasma is an active research topic in laser fusion. In particular, a large effort has been invested in studies of stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS), which can reflect laser energy and produce energetic particles to preheat a fusion energy target. Experiments, theory, and simulations agree on a complex interplay between various laser-plasma instabilities. By particle-in-cell simulations of an underdense electron plasma, apart from the standard SRS, a strong backscattering was found near the electron plasma frequency at densities beyond the quarter critical. This novel instability, recognized in recent experiments as stimulated laser scattering on a trapped electron-acoustic mode (SEAS), is absent from a classical theory of laser-parametric instabilities. A parametric excitation of SEAS instability is explained by a three-wave resonant decay of the incident laser light into a standing backscattered wave and a slow trapped electron-acoustic wave (omega LT omega(p)). Large SEAS pulsations, eventually suppressed by relativistic heating of electrons, are observed in these simulations. This phenomenon seems relevant to future hohlraum target and fast ignition experiments.", journal = "Fusion Science and Technology", title = "On stimulated scattering of laser light in inertial fusion energy targets", volume = "43", number = "3", pages = "359-365", doi = "10.13182/FST03-A279" }
Nikolić, L., Škorić, M. M., Ishiguro, S.,& Sato, T.. (2003). On stimulated scattering of laser light in inertial fusion energy targets. in Fusion Science and Technology, 43(3), 359-365. https://doi.org/10.13182/FST03-A279
Nikolić L, Škorić MM, Ishiguro S, Sato T. On stimulated scattering of laser light in inertial fusion energy targets. in Fusion Science and Technology. 2003;43(3):359-365. doi:10.13182/FST03-A279 .
Nikolić, Ljubomir, Škorić, Miloš M., Ishiguro, Seiji, Sato, Tetsuya, "On stimulated scattering of laser light in inertial fusion energy targets" in Fusion Science and Technology, 43, no. 3 (2003):359-365, https://doi.org/10.13182/FST03-A279 . .