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Title: Mitigation of self-focusing in Thomson scattering experiments

Abstract

A fundamental challenge associated with measuring Thomson scattering comes from the small scattering cross section associated with the interaction. Here, to improve photon statistics a powerful Thomson-scattering probe laser is required. Ponderomotive self-focusing limits the maximum power in the Thomson-scattering probe and was shown to limit the maximum achievable Thomson-scattering signal-to-noise ratio. Operating the laser at powers above the self-focusing critical power was shown to cause beam degradation, which reduced the amount of collected Thomson-scattered light. Using a phase plate was shown to improve laser beam propagation, and consequently improve the signal-to-noise ratio in the measured spectrum.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1]
  1. Univ. of Rochester, NY (United States)
Publication Date:
Research Org.:
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
Contributing Org.:
Laboratory for Laser Energetics, University of Rochester
OSTI Identifier:
1572077
Report Number(s):
2019-119, 2485, 1525
Journal ID: ISSN 1070-664X; 2019-119, 2485, 1525
Grant/Contract Number:  
NA0003856
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 26; Journal Issue: 10; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Hansen, A. M., Turnbull, D., Katz, J., and Froula, D. H. Mitigation of self-focusing in Thomson scattering experiments. United States: N. p., 2019. Web. doi:10.1063/1.5125249.
Hansen, A. M., Turnbull, D., Katz, J., & Froula, D. H. Mitigation of self-focusing in Thomson scattering experiments. United States. doi:10.1063/1.5125249.
Hansen, A. M., Turnbull, D., Katz, J., and Froula, D. H. Wed . "Mitigation of self-focusing in Thomson scattering experiments". United States. doi:10.1063/1.5125249.
@article{osti_1572077,
title = {Mitigation of self-focusing in Thomson scattering experiments},
author = {Hansen, A. M. and Turnbull, D. and Katz, J. and Froula, D. H.},
abstractNote = {A fundamental challenge associated with measuring Thomson scattering comes from the small scattering cross section associated with the interaction. Here, to improve photon statistics a powerful Thomson-scattering probe laser is required. Ponderomotive self-focusing limits the maximum power in the Thomson-scattering probe and was shown to limit the maximum achievable Thomson-scattering signal-to-noise ratio. Operating the laser at powers above the self-focusing critical power was shown to cause beam degradation, which reduced the amount of collected Thomson-scattered light. Using a phase plate was shown to improve laser beam propagation, and consequently improve the signal-to-noise ratio in the measured spectrum.},
doi = {10.1063/1.5125249},
journal = {Physics of Plasmas},
number = 10,
volume = 26,
place = {United States},
year = {2019},
month = {10}
}

Journal Article:
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