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Title: Amplification of light in a plasma by stimulated ion acoustic waves driven by multiple crossing pump beams

Abstract

Experiments demonstrate the amplification of 351 nm laser light in a hot dense plasma similar to those in inertial confinement fusion ignition experiments. A seed beam interacts with one or two counter-propagating pump beams, each with an intensity of 1.2x10{sup 15} W/cm{sup 2} at 351 nm, crossing the seed at 24.8 deg. at the position where the flow is Mach 1, allowing resonant stimulation of ion acoustic waves. Results show that the energy and power transferred to the seed are increased with two pumps beyond the level that occurs with a single pump, demonstrating that, under conditions similar to ignition experiments where each beam has a low gain exponent, the total scatter produced by the multiple beams can be significantly larger than that of the individual beams. It is further demonstrated that the amplification is greatly reduced when the pump polarization is orthogonal to the seed, as expected from models of stimulated scatter.

Authors:
; ; ; ; ; ; ; ;  [1];  [2]
  1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
  2. Laboratory of Laser Energetics, University of Rochester, Rochester, NY 14623 (United States)
Publication Date:
OSTI Identifier:
21611554
Resource Type:
Journal Article
Journal Name:
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)
Additional Journal Information:
Journal Volume: 84; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevE.84.026402; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1539-3755
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; INERTIAL CONFINEMENT; ION ACOUSTIC WAVES; LASERS; PLASMA; POLARIZATION; PUMPS; STIMULATION; THERMONUCLEAR IGNITION; CONFINEMENT; EQUIPMENT; ION WAVES; PLASMA CONFINEMENT; PLASMA WAVES

Citation Formats

Kirkwood, R K, Michel, P, London, R A, Callahan, D, Meezan, N, Williams, E, Suter, L, Haynam, C, Landen, O, and Seka, W. Amplification of light in a plasma by stimulated ion acoustic waves driven by multiple crossing pump beams. United States: N. p., 2011. Web. doi:10.1103/PHYSREVE.84.026402.
Kirkwood, R K, Michel, P, London, R A, Callahan, D, Meezan, N, Williams, E, Suter, L, Haynam, C, Landen, O, & Seka, W. Amplification of light in a plasma by stimulated ion acoustic waves driven by multiple crossing pump beams. United States. https://doi.org/10.1103/PHYSREVE.84.026402
Kirkwood, R K, Michel, P, London, R A, Callahan, D, Meezan, N, Williams, E, Suter, L, Haynam, C, Landen, O, and Seka, W. 2011. "Amplification of light in a plasma by stimulated ion acoustic waves driven by multiple crossing pump beams". United States. https://doi.org/10.1103/PHYSREVE.84.026402.
@article{osti_21611554,
title = {Amplification of light in a plasma by stimulated ion acoustic waves driven by multiple crossing pump beams},
author = {Kirkwood, R K and Michel, P and London, R A and Callahan, D and Meezan, N and Williams, E and Suter, L and Haynam, C and Landen, O and Seka, W},
abstractNote = {Experiments demonstrate the amplification of 351 nm laser light in a hot dense plasma similar to those in inertial confinement fusion ignition experiments. A seed beam interacts with one or two counter-propagating pump beams, each with an intensity of 1.2x10{sup 15} W/cm{sup 2} at 351 nm, crossing the seed at 24.8 deg. at the position where the flow is Mach 1, allowing resonant stimulation of ion acoustic waves. Results show that the energy and power transferred to the seed are increased with two pumps beyond the level that occurs with a single pump, demonstrating that, under conditions similar to ignition experiments where each beam has a low gain exponent, the total scatter produced by the multiple beams can be significantly larger than that of the individual beams. It is further demonstrated that the amplification is greatly reduced when the pump polarization is orthogonal to the seed, as expected from models of stimulated scatter.},
doi = {10.1103/PHYSREVE.84.026402},
url = {https://www.osti.gov/biblio/21611554}, journal = {Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)},
issn = {1539-3755},
number = 2,
volume = 84,
place = {United States},
year = {Mon Aug 15 00:00:00 EDT 2011},
month = {Mon Aug 15 00:00:00 EDT 2011}
}

Works referencing / citing this record:

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