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

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.

Authors:
 [1];  [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [4];  [3]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [1]; ORCiD logo [4]; ORCiD logo [4];  [3]
+ Show Author Affiliations
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Illinois at Urbana-Champaign, IL (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
OSTI Identifier:
1784211
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Plasma Physics and Controlled Fusion
Additional Journal Information:
Journal Volume: 60; Journal Issue: 6; Journal ID: ISSN 0741-3335
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; helicon; power balance; parallel heat transport; thermocouples; fluroptic probes; heat deposition; linear plasma device

Citation Formats

Showers, Melissa A., Piotrowicz, Pawel A., Beers, Clyde, Biewer, Theodore, Caneses Marin, Juan, Caughman, John, Donovan, David, Goulding, Richard, Lumsdaine, Arnold, Kafle, Nischal, Owen, Larry W., Rapp, Juergen, and Flynn, Holly. Power accounting of plasma discharges in the linear device Proto-MPEX. United States: N. p., 2018. Web. doi:10.1088/1361-6587/aab7c8.
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Showers, Melissa A., Piotrowicz, Pawel A., Beers, Clyde, Biewer, Theodore, Caneses Marin, Juan, Caughman, John, Donovan, David, Goulding, Richard, Lumsdaine, Arnold, Kafle, Nischal, Owen, Larry W., Rapp, Juergen, & Flynn, Holly. Power accounting of plasma discharges in the linear device Proto-MPEX. United States. https://doi.org/10.1088/1361-6587/aab7c8
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Showers, Melissa A., Piotrowicz, Pawel A., Beers, Clyde, Biewer, Theodore, Caneses Marin, Juan, Caughman, John, Donovan, David, Goulding, Richard, Lumsdaine, Arnold, Kafle, Nischal, Owen, Larry W., Rapp, Juergen, and Flynn, Holly. Tue . "Power accounting of plasma discharges in the linear device Proto-MPEX". United States. https://doi.org/10.1088/1361-6587/aab7c8. https://www.osti.gov/servlets/purl/1784211.
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@article{osti_1784211,
title = {Power accounting of plasma discharges in the linear device Proto-MPEX},
author = {Showers, Melissa A. and Piotrowicz, Pawel A. and Beers, Clyde and Biewer, Theodore and Caneses Marin, Juan and Caughman, John and Donovan, David and Goulding, Richard and Lumsdaine, Arnold and Kafle, Nischal and Owen, Larry W. and Rapp, Juergen and Flynn, Holly},
abstractNote = {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.},
doi = {10.1088/1361-6587/aab7c8},
journal = {Plasma Physics and Controlled Fusion},
number = 6,
volume = 60,
place = {United States},
year = {Tue Apr 10 00:00:00 EDT 2018},
month = {Tue Apr 10 00:00:00 EDT 2018}
}
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https://doi.org/10.1088/1361-6587/aab7c8
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Works referenced in this record:

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Transport simulations of linear plasma generators with the B2.5-Eirene and EMC3-Eirene codes
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Heat flux estimates of power balance on Proto-MPEX with IR imaging
journal, August 2016

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    Works referencing / citing this record:

    Radial transport modeling of high density deuterium plasmas in proto-MPEX with the B2.5-Eirene code
    journal, April 2019

    • Rapp, J.; Owen, L. W.; Canik, J.
    • Physics of Plasmas, Vol. 26, Issue 4
    • DOI: 10.1063/1.5049808

    Utilization of O-X-B mode conversion of 28 GHz microwaves to heat core electrons in the upgraded Proto-MPEX
    journal, May 2019

    • Biewer, T. M.; Lau, C.; Bigelow, T. S.
    • Physics of Plasmas, Vol. 26, Issue 5
    • DOI: 10.1063/1.5093321

    Results of Ion Cyclotron Heating Experiments on Proto-MPEX Utilizing a Movable Stainless Steel Target
    journal, June 2019

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