Inversion technique to obtain local ion temperature profiles for an axisymmetric plasma with toroidal and radial velocities

Bell, Ronald E.

doi:10.1088/1361-6587/abe911

Inversion technique to obtain local ion temperature profiles for an axisymmetric plasma with toroidal and radial velocities

Journal Article · Thu Mar 18 00:00:00 EDT 2021 · Plasma Physics and Controlled Fusion

DOI:https://doi.org/10.1088/1361-6587/abe911· OSTI ID:1814566

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Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

A matrix inversion technique is derived to calculate local ion temperature from line-integrated measurements of an extended emission source in an axisymmetric plasma which exactly corrects for both toroidal velocity and radial velocity components. Local emissivity and toroidal velocity can be directly recovered from line-integrated spectroscopic measurements, but an independent measurement of the radial velocity is necessary to complete the temperature inversion. The extension of this technique to handle the radial velocity is relevant for magnetic reconnection and merging compression devices where temperature inversion from spectroscopic measurements is desired. A simulation demonstrates the effects of radial velocity on the determination of ion temperature.

View Accepted Manuscript (DOE)

Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

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

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1814566

Journal Information:: Plasma Physics and Controlled Fusion, Journal Name: Plasma Physics and Controlled Fusion Journal Issue: 4 Vol. 63; ISSN 0741-3335

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ion temperature
magnetic reconnection
merging compression
plasma spectroscopy
radial velocity
tomographic inversion

Inversion technique to obtain local ion temperature profiles for an axisymmetric plasma with toroidal and radial velocities

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