Investigation of laser plasma instabilities driven by 527 nm laser pulses relevant for direct drive inertial confinement fusion

Year: 2024

Authors: Wasser F., Zdhter S., Rivers M., Atzeni S., Condamine FP., Cristoforetti G., Fauvel G., Fischer N., Gizzi LA., Hoffmann D., Koester P., Lastovicka T., Myatt JF., Singh RL., Sokol M., Theobald W., Weber S., Ditmire T., Forner T., Roth M.

Autors Affiliation: Focused Energy GmbH, Tiefen See 45, D-64293 Darmstadt, Germany; IU Internatl Hsch GmbH, Darmstadter Landstr 110, D-60598 Frankfurt, Germany; Univ Texas Austin, 110 Inner Campus Dr, Austin, TX 78712 USA; Extreme Light Infrastruct ER, Extreme Light Infrastruct ERIC, Dolni Brezany 25241, Czech Republic; Intense Laser Irradiat Lab, INO CNR, Pisa, Italy; Goethe Univ, Max von Laue Str 1, D-60438 Frankfurt, Germany; Univ Alberta, Dept Elect & Comp Engn, 9211 116 St NW, Edmonton, AB T6G 1H9, Canada; Univ Rochester, Dept Mech Engn, Rochester, NY 14623 USA; Tech Univ Darmstadt, Schlossgartenstr 9, D-64289 Darmstadt, Germany.

Abstract: We report on a study of laser plasma instabilities with 527 nm laser pulses in an intensity range of 0.5 x 10(13) – 1.1 x 10(15) W cm(-2) and plasma parameters entering a regime that is relevant for direct drive inertial confinement fusion. Using the kilojoule high repetition rate L4n laser at the Extreme Light Infrastructure-Beamlines, more than 1300 shots were collected, and the onset and the growth of stimulated Brioullin scattering (SBS) and stimulated Raman scattering (SRS) were studied with a high confidence level. The measured onset intensities are 0.2 x 10(14) W cm(-2 ) for SBS and 1.4 x 10(14) W cm(-2) for SRS. At the maximum intensity, the total fraction of backscattered energy reaches 2.5% for SBS and 0.1% for SRS. These results are of high relevance for advanced concepts for inertial fusion energy, which rely on the use of 527 nm laser light to drive the implosion of the fuel target, and in particular, they can be used as a benchmark for advanced simulations.

Journal/Review: PHYSICS OF PLASMAS

Volume: 31 (2)      Pages from: 22107-1  to: 22107-7

KeyWords: Stimulated Raman-scattering; Energy; Mitigation; Physics; Preheat; Matter
DOI: 10.1063/5.0188693

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