Heat Flux Analysis from IR Imaging on Proto-MPEX

Cornwall Lau; J. F. Caneses; P. A. Piotrowicz; Melissa A. Showers; Clyde Joshua Beers; Theodore M. Biewer; T. S. Bigelow; J. B.O. Caughman; R. H. Goulding; N. Kafle; J. Rapp

doi:10.1109/TPS.2020.3011891

Heat Flux Analysis from IR Imaging on Proto-MPEX

Cornwall Lau, J. F. Caneses, P. A. Piotrowicz, Melissa A. Showers, Clyde Joshua Beers, Theodore M. Biewer, T. S. Bigelow, J. B.O. Caughman, R. H. Goulding, N. Kafle, J. Rapp

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

The Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is a linear device used to develop the source and heating concept for MPEX, an experiment to study plasma-material interactions for future fusion reactors. This article will highlight recent analysis and results on Proto-MPEX using an infrared (IR) camera, a key tool for imaging heat fluxes measured at the material target. The target heat fluxes are crucial to understanding the source and heating concepts. The recent analysis includes the application of homography and 3-D finite-element methods to provide between-shot measurements of the 2-D target heat flux profile. The IR camera inferred heat flux is shown to correlate with Langmuir probe inferred heat fluxes for a range of parameters in helicon only and helicon + electron cyclotron heated discharges. Results show both desirable central and undesirable edge heat flux for helicon source and electron heating on the target. These heat flux measurements are shown to be important for better understanding of the source and heating physics.

Original language	English
Article number	9159614
Pages (from-to)	3152-3159
Number of pages	8
Journal	IEEE Transactions on Plasma Science
Volume	48
Issue number	9
DOIs	https://doi.org/10.1109/TPS.2020.3011891
State	Published - Sep 2020

Funding

Manuscript received November 22, 2019; revised June 20, 2020; accepted July 20, 2020. Date of publication August 5, 2020; date of current version September 11, 2020. This work was supported in part by the Oak Ridge National Laboratory through the U.S. Department of Energy (DOE) Contract under Grant DE-AC05-00OR22725 C, in part by the U.S. DOE, Office of Science, Office of Fusion Energy Sciences under Contract DE-AC05-00OR22725, and in part by UT-Battelle, LLC, with the U.S. DOE, under Contract DE-AC05-00OR22725. The review of this article was arranged by Senior Editor S. Portillo. (Corresponding author: Cornwall Lau.) Cornwall Lau, J. F. Caneses, Theodore M. Biewer, T. S. Bigelow, J. B. O. Caughman, R. H. Goulding, N. Kafle, and J. Rapp are with the Oak Ridge National Laboratory, Oak Ridge, TN 37830 USA (e-mail: [email protected]).

Funders	Funder number
U.S. DOE
U.S. Department of Energy
Office of Science
Fusion Energy Sciences	DE-AC05-00OR22725 C
Oak Ridge National Laboratory

Keywords

Heat flux
Material Plasma Exposure eXperiment (MPEX)
heating
infrared (IR) imaging
plasma-material interactions (PMIs)

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1109/TPS.2020.3011891

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title = "Heat Flux Analysis from IR Imaging on Proto-MPEX",

abstract = "The Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is a linear device used to develop the source and heating concept for MPEX, an experiment to study plasma-material interactions for future fusion reactors. This article will highlight recent analysis and results on Proto-MPEX using an infrared (IR) camera, a key tool for imaging heat fluxes measured at the material target. The target heat fluxes are crucial to understanding the source and heating concepts. The recent analysis includes the application of homography and 3-D finite-element methods to provide between-shot measurements of the 2-D target heat flux profile. The IR camera inferred heat flux is shown to correlate with Langmuir probe inferred heat fluxes for a range of parameters in helicon only and helicon + electron cyclotron heated discharges. Results show both desirable central and undesirable edge heat flux for helicon source and electron heating on the target. These heat flux measurements are shown to be important for better understanding of the source and heating physics.",

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AU - Beers, Clyde Joshua

AU - Biewer, Theodore M.

AU - Bigelow, T. S.

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AU - Goulding, R. H.

AU - Kafle, N.

AU - Rapp, J.

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AB - The Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is a linear device used to develop the source and heating concept for MPEX, an experiment to study plasma-material interactions for future fusion reactors. This article will highlight recent analysis and results on Proto-MPEX using an infrared (IR) camera, a key tool for imaging heat fluxes measured at the material target. The target heat fluxes are crucial to understanding the source and heating concepts. The recent analysis includes the application of homography and 3-D finite-element methods to provide between-shot measurements of the 2-D target heat flux profile. The IR camera inferred heat flux is shown to correlate with Langmuir probe inferred heat fluxes for a range of parameters in helicon only and helicon + electron cyclotron heated discharges. Results show both desirable central and undesirable edge heat flux for helicon source and electron heating on the target. These heat flux measurements are shown to be important for better understanding of the source and heating physics.

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Heat Flux Analysis from IR Imaging on Proto-MPEX

Abstract

Funding

Keywords

UN SDGs

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