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Title: Operational domain of Proto-MPEX

Abstract

The Prototype-Material Plasma Exposure eXperiment (Proto-MPEX) is a linear plasma device to test the plasma source concepts for the future Material Plasma Exposure eXperiment (MPEX). MPEX is planned to address plasma material interactions under fusion reactor divertor conditions as will occur in devices like DEMO, including the plasma exposure of a-priori neutron irradiated materials. This requires a novel linear plasma device with a plasma source that can produce high electron densities along with heating systems to obtain high electron and ion temperatures. In Proto-MPEX a high-power helicon source was tested together with electron heating (28 GHz microwaves) and ion cyclotron heating (8.5-12 MHz). Electron densities in excess of 1 × 1020 m-3 were produced with the helicon antenna. Electron temperatures can reach 20 eV and are typically below 6 eV at high densities (>5 × 1019 m-3). Ion heating has been demonstrated at low electron densities (<2 × 1019 m-3) with ion temperatures of up to 13 eV. Maximum heat fluxes of 14 MW/m2 have been obtained in low density discharges (~5 × 1018 m-3), while heat fluxes are typically only 2–3 MW/m2 in high density discharges (>2 × 1019 m-3).

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1486967
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Journal Name:
Fusion Engineering and Design
Additional Journal Information:
Journal Volume: 136; Conference: International Symposium on Fusion Nuclear Technology - Kyoto, Japan - 9/25/2017 8:00:00 AM-9/29/2017 8:00:00 AM, Kyoto, Japan, 9/25 - 9/29/2017; Journal ID: ISSN 0920-3796
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

Citation Formats

Rapp, Juergen, Beers, Clyde J., Biewer, Theodore M., Bigelow, Tim S., Caneses Marin, Juan F., Caughman, John B., Diem, Stephanie, Goulding, Richard Howell, Isler, Ralph, Kafle, Nischal, Owen, Larry W., and Showers, Melissa A. Operational domain of Proto-MPEX. United States: N. p., 2018. Web. doi:10.1016/j.fusengdes.2018.03.064.
Rapp, Juergen, Beers, Clyde J., Biewer, Theodore M., Bigelow, Tim S., Caneses Marin, Juan F., Caughman, John B., Diem, Stephanie, Goulding, Richard Howell, Isler, Ralph, Kafle, Nischal, Owen, Larry W., & Showers, Melissa A. Operational domain of Proto-MPEX. United States. doi:10.1016/j.fusengdes.2018.03.064.
Rapp, Juergen, Beers, Clyde J., Biewer, Theodore M., Bigelow, Tim S., Caneses Marin, Juan F., Caughman, John B., Diem, Stephanie, Goulding, Richard Howell, Isler, Ralph, Kafle, Nischal, Owen, Larry W., and Showers, Melissa A. Sat . "Operational domain of Proto-MPEX". United States. doi:10.1016/j.fusengdes.2018.03.064. https://www.osti.gov/servlets/purl/1486967.
@article{osti_1486967,
title = {Operational domain of Proto-MPEX},
author = {Rapp, Juergen and Beers, Clyde J. and Biewer, Theodore M. and Bigelow, Tim S. and Caneses Marin, Juan F. and Caughman, John B. and Diem, Stephanie and Goulding, Richard Howell and Isler, Ralph and Kafle, Nischal and Owen, Larry W. and Showers, Melissa A.},
abstractNote = {The Prototype-Material Plasma Exposure eXperiment (Proto-MPEX) is a linear plasma device to test the plasma source concepts for the future Material Plasma Exposure eXperiment (MPEX). MPEX is planned to address plasma material interactions under fusion reactor divertor conditions as will occur in devices like DEMO, including the plasma exposure of a-priori neutron irradiated materials. This requires a novel linear plasma device with a plasma source that can produce high electron densities along with heating systems to obtain high electron and ion temperatures. In Proto-MPEX a high-power helicon source was tested together with electron heating (28 GHz microwaves) and ion cyclotron heating (8.5-12 MHz). Electron densities in excess of 1 × 1020 m-3 were produced with the helicon antenna. Electron temperatures can reach 20 eV and are typically below 6 eV at high densities (>5 × 1019 m-3). Ion heating has been demonstrated at low electron densities (<2 × 1019 m-3) with ion temperatures of up to 13 eV. Maximum heat fluxes of 14 MW/m2 have been obtained in low density discharges (~5 × 1018 m-3), while heat fluxes are typically only 2–3 MW/m2 in high density discharges (>2 × 1019 m-3).},
doi = {10.1016/j.fusengdes.2018.03.064},
journal = {Fusion Engineering and Design},
issn = {0920-3796},
number = ,
volume = 136,
place = {United States},
year = {2018},
month = {12}
}

Conference:
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