Helicon plasma ion temperature measurements and observed ion cyclotron heating in proto-MPEX

Beers, Clyde J.; Goulding, Richard Howell; Isler, Ralph C.; Martin, Elijah H.; Biewer, Theodore M.; Caneses Marin, Juan F.; Caughman, John B.; Kafle, Nischal; Rapp, Juergen

doi:10.1063/1.4994541

Title: Helicon plasma ion temperature measurements and observed ion cyclotron heating in proto-MPEX

Journal Article · Tue Jan 23 00:00:00 EST 2018 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4994541· OSTI ID:1458378

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Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States). Bredesen Center
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States). Dept. of Nuclear Engineering

The Prototype-Material Plasma Exposure eXperiment (Proto-MPEX) linear plasma device is a test bed for exploring and developing plasma source concepts to be employed in the future steady-state linear device Material Plasma Exposure eXperiment (MPEX) that will study plasma-material interactions for the nuclear fusion program. The concept foresees using a helicon plasma source supplemented with electron and ion heating systems to reach necessary plasma conditions. Here in this paper, we discuss ion temperature measurements obtained from Doppler broadening of spectral lines from argon ion test particles. Plasmas produced with helicon heating alone have average ion temperatures downstream of the Helicon antenna in the range of 3 ± 1 eV; ion temperature increases to 10 ± 3 eV are observed with the addition of ion cyclotron heating (ICH). The temperatures are higher at the edge than the center of the plasma either with or without ICH. This type of profile is observed with electrons as well. Finally, a one-dimensional RF antenna model is used to show where heating of the plasma is expected.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1458378

Alternate ID(s):: OSTI ID: 1417778

Journal Information:: Physics of Plasmas, Vol. 25, Issue 1; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 20 works

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Plasma mass separation Zweben, S. J.; Gueroult, R.; Fisch, N. J. Physics of Plasmas, Vol. 25, Issue 9 https://doi.org/10.1063/1.5042845	journal	September 2018
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Computational investigation of ion cyclotron heating on Proto-MPEX Piotrowicz, P. A.; Goulding, R. H.; Caneses, J. F. Physics of Plasmas, Vol. 26, Issue 3 https://doi.org/10.1063/1.5065784	journal	March 2019
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