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Title: Exact relativistic expressions for polarization of incoherent Thomson scattering

Abstract

We present a derivation of the degree of polarization for incoherent Thomson scattering (TS) using Mueller matrix formalism. An exact analytic solution is obtained for spectrum-integrated matrix elements. The solution is valid for the full range of incident polarizations, scattering angles, and electron thermal motion from non-relativistic to ultra-relativistic. It is based on a newly developed theoretical model, a finite transit time (FTT) correction to previous theoretical work on TS polarization. The Mueller matrix elements are substantially different from previous calculations without the FTT correction, even to the lowest linear order in Te=mec2 <<1. Mathematically, the derivation is a unique example of fully analytical integration of the 3D scattering operator over a relativistic Maxwellian distribution function; experimentally, the results have application to the use of the polarization properties of Thomson scattered light as a method of electron temperature measurement. The results can also be used as a reliable tool for benchmarking and verification of numerical codes for frequency resolved properties of TS polarization.

Authors:
ORCiD logo [1];  [1];  [2]
  1. Univ. of Wisconsin, Madison, WI (United States). Dept. of Physics and the Center for Magnetic Self-Organization in Lab. and Astrophysical Plasmas
  2. Univ. of California, Los Angeles, CA (United States)
Publication Date:
Research Org.:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1471066
Alternate Identifier(s):
OSTI ID: 1252263
Grant/Contract Number:  
FG02-85ER53212; FC02-05ER54814
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; Journal Issue: 5; 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

Mirnov, V. V., Den Hartog, D. J., and Parke, E. Exact relativistic expressions for polarization of incoherent Thomson scattering. United States: N. p., 2016. Web. doi:10.1063/1.4948488.
Mirnov, V. V., Den Hartog, D. J., & Parke, E. Exact relativistic expressions for polarization of incoherent Thomson scattering. United States. doi:10.1063/1.4948488.
Mirnov, V. V., Den Hartog, D. J., and Parke, E. Mon . "Exact relativistic expressions for polarization of incoherent Thomson scattering". United States. doi:10.1063/1.4948488. https://www.osti.gov/servlets/purl/1471066.
@article{osti_1471066,
title = {Exact relativistic expressions for polarization of incoherent Thomson scattering},
author = {Mirnov, V. V. and Den Hartog, D. J. and Parke, E.},
abstractNote = {We present a derivation of the degree of polarization for incoherent Thomson scattering (TS) using Mueller matrix formalism. An exact analytic solution is obtained for spectrum-integrated matrix elements. The solution is valid for the full range of incident polarizations, scattering angles, and electron thermal motion from non-relativistic to ultra-relativistic. It is based on a newly developed theoretical model, a finite transit time (FTT) correction to previous theoretical work on TS polarization. The Mueller matrix elements are substantially different from previous calculations without the FTT correction, even to the lowest linear order in Te=mec2 <<1. Mathematically, the derivation is a unique example of fully analytical integration of the 3D scattering operator over a relativistic Maxwellian distribution function; experimentally, the results have application to the use of the polarization properties of Thomson scattered light as a method of electron temperature measurement. The results can also be used as a reliable tool for benchmarking and verification of numerical codes for frequency resolved properties of TS polarization.},
doi = {10.1063/1.4948488},
journal = {Physics of Plasmas},
number = 5,
volume = 23,
place = {United States},
year = {2016},
month = {5}
}

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