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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 1.2 × 10 15 W/cm 2 at 351 nm, crossing the seed at 24.8° 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];  [1];  [1];  [1];  [1];  [1];  [2];  [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1419004
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Additional Journal Information:
Journal Volume: 84; Journal Issue: 2; Journal ID: ISSN 1539-3755
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 70 PLASMA PHYSICS AND FUSION

Citation Formats

Kirkwood, R. K., Michel, P., London, R. A., Callahan, D., Meezan, N., Williams, E., Seka, W., Suter, L., Haynam, C., and Landen, O. 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., Seka, W., Suter, L., Haynam, C., & Landen, O. Amplification of light in a plasma by stimulated ion acoustic waves driven by multiple crossing pump beams. United States. doi:10.1103/PhysRevE.84.026402.
Kirkwood, R. K., Michel, P., London, R. A., Callahan, D., Meezan, N., Williams, E., Seka, W., Suter, L., Haynam, C., and Landen, O. Thu . "Amplification of light in a plasma by stimulated ion acoustic waves driven by multiple crossing pump beams". United States. doi:10.1103/PhysRevE.84.026402. https://www.osti.gov/servlets/purl/1419004.
@article{osti_1419004,
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 Seka, W. and Suter, L. and Haynam, C. and Landen, O.},
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 1.2 × 1015 W/cm2 at 351 nm, crossing the seed at 24.8° 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},
journal = {Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics},
number = 2,
volume = 84,
place = {United States},
year = {2011},
month = {8}
}

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