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

Abstract

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.

Authors:

^[1];

^[2];

^[2]; Kafle, Nischal ^[3];

^[2]

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

Publication Date:: Tue Jan 23 00:00:00 EST 2018

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

Sponsoring Org.:: USDOE

OSTI Identifier:: 1458378

Alternate Identifier(s):: OSTI ID: 1417778

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Physics of Plasmas

Additional Journal Information:: Journal Volume: 25; Journal Issue: 1; Journal ID: ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats


                    Beers, Clyde J., Goulding, Richard Howell, Isler, Ralph C., Martin, Elijah H., Biewer, Theodore M., Caneses Marin, Juan F., Caughman, John B., Kafle, Nischal, and Rapp, Juergen. Helicon plasma ion temperature measurements and observed ion cyclotron heating in proto-MPEX.  United States: N. p., 2018. 
Web.  doi:10.1063/1.4994541.

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                    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. Helicon plasma ion temperature measurements and observed ion cyclotron heating in proto-MPEX.  United States.  https://doi.org/10.1063/1.4994541

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                    Beers, Clyde J., Goulding, Richard Howell, Isler, Ralph C., Martin, Elijah H., Biewer, Theodore M., Caneses Marin, Juan F., Caughman, John B., Kafle, Nischal, and Rapp, Juergen. Tue .  
"Helicon plasma ion temperature measurements and observed ion cyclotron heating in proto-MPEX".  United States.  https://doi.org/10.1063/1.4994541.  https://www.osti.gov/servlets/purl/1458378.

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@article{osti_1458378,

  title        = {Helicon plasma ion temperature measurements and observed ion cyclotron heating in proto-MPEX},

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

  abstractNote = {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.},

  doi          = {10.1063/1.4994541},

  journal      = {Physics of Plasmas},

  number       = 1,

  volume       = 25,

  place        = {United States},

  year         = {Tue Jan 23 00:00:00 EST 2018},

  month        = {Tue Jan 23 00:00:00 EST 2018}

}

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Journal Article:

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https://doi.org/10.1063/1.4994541

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Cited by: 20 works

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Figures / Tables:

Figure 1: A cross-section of the Proto-MPEX experiment and axial magnetic field strength with the 12 magnets shown as red boxes in standard operating conditions. The probe locations mark the optical viewing locations used in this experiment.

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Works referenced in this record:

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Works referencing / citing this record:

Differential pumping requirements for the light-ion helicon source and heating systems of Proto-MPEX
journal, August 2018

Caneses, J. F.; Piotrowicz, P. A.; Biewer, T. M.
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Radial transport modeling of high density deuterium plasmas in proto-MPEX with the B2.5-Eirene code
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Computational investigation of ion cyclotron heating on Proto-MPEX
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Physics of Plasmas, Vol. 26, Issue 3
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Latest Results from Proto-MPEX and the Future Plans for MPEX
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Results of Ion Cyclotron Heating Experiments on Proto-MPEX Utilizing a Movable Stainless Steel Target
journal, June 2019

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Fusion Science and Technology, Vol. 75, Issue 7
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Title: Helicon plasma ion temperature measurements and observed ion cyclotron heating in proto-MPEX

Abstract

Citation Formats

Figures / Tables:

Operational characteristics of the high flux plasma generator Magnum-PSI journal, October 2014

Enhanced slow‐wave beach heating of mirror plasmas with two‐ion species journal, June 1992

Direct electron heating experiment on the Aditya tokamak using fast waves in the ion cyclotron resonance frequency range journal, August 2011

Transport simulations of linear plasma generators with the B2.5-Eirene and EMC3-Eirene codes journal, August 2015

Observation of magnetic fields in laser-produced plasma using the Zeeman effect journal, January 1984

High heat flux capabilities of the Magnum-PSI linear plasma device journal, October 2013

Spectroscopic characterization of the DIII-D divertor journal, February 1997

A new plasma‐surface interactions research facility: PISCES‐B and first materials erosion experiments on bulk‐boronized graphite journal, May 1990

Physics basis and design of the ITER plasma-facing components journal, August 2011

Generalized theory of helicon waves. II. Excitation and absorption journal, May 1998

New linear plasma devices in the trilateral euregio cluster for an integrated approach to plasma surface interactions in fusion reactors journal, October 2011

Restoring with Maximum Likelihood and Maximum Entropy* journal, January 1972

Electron heating during ion cyclotron resonance heating in JET journal, June 1989

The Development of Plasma-Material Interaction Facilities for the Future of Fusion Technology journal, August 2013

Fueling and heating of tandem mirror end cells using rf at the ion-cyclotron frequency journal, January 1985

Construction of the plasma-wall experiment Magnum-PSI journal, December 2010

Temperature and Power Measurements in a Plasma Heated by Absorption of Ion Cyclotron Waves journal, January 1965

Plasma production and heating in a tandem mirror central cell by radio-frequency waves in the ion cyclotron frequency range journal, January 1988

Determination of carbon release mechanisms in the DIII-D divertors from analysis of C I line profiles journal, January 2007

The Development of the Material Plasma Exposure Experiment journal, December 2016

Plasma Characterization in Divertor Simulation Experiments with a V-Shaped Target on GAMMA 10/PDX journal, May 2013

Plasma source development for fusion-relevant material testing journal, May 2017

Differential pumping requirements for the light-ion helicon source and heating systems of Proto-MPEX journal, August 2018

Plasma mass separation journal, September 2018

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

Computational investigation of ion cyclotron heating on Proto-MPEX journal, March 2019

Latest Results from Proto-MPEX and the Future Plans for MPEX journal, June 2019

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

Operational characteristics of the high flux plasma generator Magnum-PSI
journal, October 2014

Enhanced slow‐wave beach heating of mirror plasmas with two‐ion species
journal, June 1992

Direct electron heating experiment on the Aditya tokamak using fast waves in the ion cyclotron resonance frequency range
journal, August 2011

Transport simulations of linear plasma generators with the B2.5-Eirene and EMC3-Eirene codes
journal, August 2015

Observation of magnetic fields in laser-produced plasma using the Zeeman effect
journal, January 1984

High heat flux capabilities of the Magnum-PSI linear plasma device
journal, October 2013

Spectroscopic characterization of the DIII-D divertor
journal, February 1997

A new plasma‐surface interactions research facility: PISCES‐B and first materials erosion experiments on bulk‐boronized graphite
journal, May 1990

Physics basis and design of the ITER plasma-facing components
journal, August 2011

Generalized theory of helicon waves. II. Excitation and absorption
journal, May 1998

New linear plasma devices in the trilateral euregio cluster for an integrated approach to plasma surface interactions in fusion reactors
journal, October 2011

Restoring with Maximum Likelihood and Maximum Entropy*
journal, January 1972

Electron heating during ion cyclotron resonance heating in JET
journal, June 1989

The Development of Plasma-Material Interaction Facilities for the Future of Fusion Technology
journal, August 2013

Fueling and heating of tandem mirror end cells using rf at the ion-cyclotron frequency
journal, January 1985

Construction of the plasma-wall experiment Magnum-PSI
journal, December 2010

Temperature and Power Measurements in a Plasma Heated by Absorption of Ion Cyclotron Waves
journal, January 1965

Plasma production and heating in a tandem mirror central cell by radio-frequency waves in the ion cyclotron frequency range
journal, January 1988

Determination of carbon release mechanisms in the DIII-D divertors from analysis of C I line profiles
journal, January 2007

The Development of the Material Plasma Exposure Experiment
journal, December 2016

Plasma Characterization in Divertor Simulation Experiments with a V-Shaped Target on GAMMA 10/PDX
journal, May 2013

Plasma source development for fusion-relevant material testing
journal, May 2017

Differential pumping requirements for the light-ion helicon source and heating systems of Proto-MPEX
journal, August 2018

Plasma mass separation
journal, September 2018

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

Computational investigation of ion cyclotron heating on Proto-MPEX
journal, March 2019

Latest Results from Proto-MPEX and the Future Plans for MPEX
journal, June 2019

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