Power accounting of plasma discharges in the linear device Proto-MPEX

M. Showers; P. A. Piotrowicz; C. J. Beers; T. M. Biewer; J. Caneses; J. Canik; J. B.O. Caughman; D. C. Donovan; R. H. Goulding; A. Lumsdaine; N. Kafle; L. W. Owen; J. Rapp; H. Ray

doi:10.1088/1361-6587/aab7c8

Power accounting of plasma discharges in the linear device Proto-MPEX

M. Showers, P. A. Piotrowicz, C. J. Beers, T. M. Biewer, J. Caneses, J. Canik, J. B.O. Caughman, D. C. Donovan, R. H. Goulding, A. Lumsdaine, N. Kafle, L. W. Owen, J. Rapp, H. Ray

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Abstract

Plasma material interaction (PMI) studies are crucial to the successful development of future fusion reactors. Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is a prototype design for the MPEX, a steady-state linear device being developed to study PMI. The primary purpose of Proto-MPEX is developing the plasma heating source concepts for MPEX. A power accounting study of Proto-MPEX works to identify machine operating parameters that could improve its performance, thereby increasing its PMI research capabilities, potentially impacting the MPEX design concept. To build a comprehensive power balance, an analysis of the helicon region has been performed implementing a diagnostic suite and software modeling to identify mechanisms and locations of heat loss from the main plasma. Of the 106.3 kW of input power, up to 90.5% of the power has been accounted for in the helicon region. When the analysis was extended to encompass the device to its end plates, 49.2% of the input power was accounted for and verified diagnostically. Areas requiring further diagnostic analysis are identified. The required improvements will be implemented in future work. The data acquisition and analysis processes will be streamlined to form a working model for future power balance studies of Proto-MPEX.

Original language	English
Article number	065001
Journal	Plasma Physics and Controlled Fusion
Volume	60
Issue number	6
DOIs	https://doi.org/10.1088/1361-6587/aab7c8
State	Published - Apr 10 2018

Funding

This material is based upon work supported by the US Department of Energy, Office of Science, Office of Fusion Energy Sciences, under contract number DE-AC05-00OR22725. * This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/ downloads/doe-public-access-plan). 4 Author to whom any correspondence should be addressed.

Funders	Funder number
US Department of Energy
U.S. Department of Energy
Office of Science
Fusion Energy Sciences	DE-AC05-00OR22725

Keywords

fluroptic probes
heat Deposition
helicon
linear plasma device
parallel heat transport
power balance
thermocouples

UN SDGs

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

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10.1088/1361-6587/aab7c8

Cite this

Showers, M., Piotrowicz, P. A., Beers, C. J., Biewer, T. M., Caneses, J., Canik, J., Caughman, J. B. O., Donovan, D. C., Goulding, R. H., Lumsdaine, A., Kafle, N., Owen, L. W., Rapp, J., & Ray, H. (2018). Power accounting of plasma discharges in the linear device Proto-MPEX. Plasma Physics and Controlled Fusion, 60(6), Article 065001. https://doi.org/10.1088/1361-6587/aab7c8

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abstract = "Plasma material interaction (PMI) studies are crucial to the successful development of future fusion reactors. Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is a prototype design for the MPEX, a steady-state linear device being developed to study PMI. The primary purpose of Proto-MPEX is developing the plasma heating source concepts for MPEX. A power accounting study of Proto-MPEX works to identify machine operating parameters that could improve its performance, thereby increasing its PMI research capabilities, potentially impacting the MPEX design concept. To build a comprehensive power balance, an analysis of the helicon region has been performed implementing a diagnostic suite and software modeling to identify mechanisms and locations of heat loss from the main plasma. Of the 106.3 kW of input power, up to 90.5% of the power has been accounted for in the helicon region. When the analysis was extended to encompass the device to its end plates, 49.2% of the input power was accounted for and verified diagnostically. Areas requiring further diagnostic analysis are identified. The required improvements will be implemented in future work. The data acquisition and analysis processes will be streamlined to form a working model for future power balance studies of Proto-MPEX.",

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AU - Piotrowicz, P. A.

AU - Beers, C. J.

AU - Biewer, T. M.

AU - Caneses, J.

AU - Canik, J.

AU - Caughman, J. B.O.

AU - Donovan, D. C.

AU - Goulding, R. H.

AU - Lumsdaine, A.

AU - Kafle, N.

AU - Owen, L. W.

AU - Rapp, J.

AU - Ray, H.

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AB - Plasma material interaction (PMI) studies are crucial to the successful development of future fusion reactors. Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is a prototype design for the MPEX, a steady-state linear device being developed to study PMI. The primary purpose of Proto-MPEX is developing the plasma heating source concepts for MPEX. A power accounting study of Proto-MPEX works to identify machine operating parameters that could improve its performance, thereby increasing its PMI research capabilities, potentially impacting the MPEX design concept. To build a comprehensive power balance, an analysis of the helicon region has been performed implementing a diagnostic suite and software modeling to identify mechanisms and locations of heat loss from the main plasma. Of the 106.3 kW of input power, up to 90.5% of the power has been accounted for in the helicon region. When the analysis was extended to encompass the device to its end plates, 49.2% of the input power was accounted for and verified diagnostically. Areas requiring further diagnostic analysis are identified. The required improvements will be implemented in future work. The data acquisition and analysis processes will be streamlined to form a working model for future power balance studies of Proto-MPEX.

KW - fluroptic probes

KW - heat Deposition

KW - helicon

KW - linear plasma device

KW - parallel heat transport

KW - power balance

KW - thermocouples

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ER -

Power accounting of plasma discharges in the linear device Proto-MPEX

Abstract

Funding

Keywords

UN SDGs

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