Exact relativistic expressions for polarization of incoherent Thomson scattering

Mirnov, V. V.; Den Hartog, D. J.; Parke, E.

doi:10.1063/1.4948488

Title: Exact relativistic expressions for polarization of incoherent Thomson scattering

Journal Article · Mon May 09 00:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4948488· OSTI ID:1471066

^[1]; Den Hartog, D. J. ^[1]; Parke, E. ^[2]

Univ. of Wisconsin, Madison, WI (United States). Dept. of Physics and the Center for Magnetic Self-Organization in Lab. and Astrophysical Plasmas
Univ. of California, Los Angeles, CA (United States)

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 T_e=m_ec² <<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.

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Research Organization:: Univ. of Wisconsin, Madison, WI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: FG02-85ER53212; FC02-05ER54814

OSTI ID:: 1471066

Alternate ID(s):: OSTI ID: 1252263

Journal Information:: Physics of Plasmas, Vol. 23, Issue 5; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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References (12)

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Cited By (1)

First observation of the depolarization of Thomson scattering radiation by a fusion plasma Giudicotti, L.; Kempenaars, M.; McCormack, O. Nuclear Fusion, Vol. 58, Issue 4 https://doi.org/10.1088/1741-4326/aab3fd	journal	March 2018

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