Characterization of the helicon plasma flux to the target of Proto-MPEX
Abstract
The ITER divertor will have to handle the boundary plasma power exhaust in the form of high heat and particle flux. The Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is a plasma source development device for the proposed Material Plasma Exposure eXperiment (MPEX), which is intended to create fusion reactor divertor-like plasma conditions for studying plasma material interactions. Here, ion fluxes to various targets within Proto-MPEX are found to be 5 ± 2.5 × 1023 m–2s-1 when using only a helicon plasma source. The fluxes along the flux tube are compared for both 30 cm in front of the target and a few cm in front of the target. The emission intensity fall-off distance in front of the target is studied via Balmer series from a visible camera looking at the target. As a result, this fall-off distance of ~2–4 cm and the dissociation and ionization mean free path of D2 being over 0.5 m leads to a conclusion that Proto-MPEX is not in a high recycling regime with helicon only plasmas.
- Authors:
-
- Univ. of Tennessee, Knoxville, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1486956
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Fusion Engineering and Design
- Additional Journal Information:
- Journal Volume: 138; Journal Issue: C; Journal ID: ISSN 0920-3796
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Proto-MPEX; Ion flux; Helicon antenna
Citation Formats
Beers, Clyde J., Lindquist, Elizabeth G., Biewer, Theodore M., Caneses, Juan F., Caughman, John B. O., Goulding, Richard Howell, Kafle, Nischal, Ray, Holly B., Showers, Melissa A., Zinkle, Steven J., and Rapp, Juergen. Characterization of the helicon plasma flux to the target of Proto-MPEX. United States: N. p., 2018.
Web. doi:10.1016/j.fusengdes.2018.11.056.
Beers, Clyde J., Lindquist, Elizabeth G., Biewer, Theodore M., Caneses, Juan F., Caughman, John B. O., Goulding, Richard Howell, Kafle, Nischal, Ray, Holly B., Showers, Melissa A., Zinkle, Steven J., & Rapp, Juergen. Characterization of the helicon plasma flux to the target of Proto-MPEX. United States. https://doi.org/10.1016/j.fusengdes.2018.11.056
Beers, Clyde J., Lindquist, Elizabeth G., Biewer, Theodore M., Caneses, Juan F., Caughman, John B. O., Goulding, Richard Howell, Kafle, Nischal, Ray, Holly B., Showers, Melissa A., Zinkle, Steven J., and Rapp, Juergen. 2018.
"Characterization of the helicon plasma flux to the target of Proto-MPEX". United States. https://doi.org/10.1016/j.fusengdes.2018.11.056. https://www.osti.gov/servlets/purl/1486956.
@article{osti_1486956,
title = {Characterization of the helicon plasma flux to the target of Proto-MPEX},
author = {Beers, Clyde J. and Lindquist, Elizabeth G. and Biewer, Theodore M. and Caneses, Juan F. and Caughman, John B. O. and Goulding, Richard Howell and Kafle, Nischal and Ray, Holly B. and Showers, Melissa A. and Zinkle, Steven J. and Rapp, Juergen},
abstractNote = {The ITER divertor will have to handle the boundary plasma power exhaust in the form of high heat and particle flux. The Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is a plasma source development device for the proposed Material Plasma Exposure eXperiment (MPEX), which is intended to create fusion reactor divertor-like plasma conditions for studying plasma material interactions. Here, ion fluxes to various targets within Proto-MPEX are found to be 5 ± 2.5 × 1023 m–2s-1 when using only a helicon plasma source. The fluxes along the flux tube are compared for both 30 cm in front of the target and a few cm in front of the target. The emission intensity fall-off distance in front of the target is studied via Balmer series from a visible camera looking at the target. As a result, this fall-off distance of ~2–4 cm and the dissociation and ionization mean free path of D2 being over 0.5 m leads to a conclusion that Proto-MPEX is not in a high recycling regime with helicon only plasmas.},
doi = {10.1016/j.fusengdes.2018.11.056},
url = {https://www.osti.gov/biblio/1486956},
journal = {Fusion Engineering and Design},
issn = {0920-3796},
number = C,
volume = 138,
place = {United States},
year = {Sat Dec 08 00:00:00 EST 2018},
month = {Sat Dec 08 00:00:00 EST 2018}
}
Web of Science
Works referenced in this record:
Physics basis and design of the ITER plasma-facing components
journal, August 2011
- Pitts, R. A.; Carpentier, S.; Escourbiac, F.
- Journal of Nuclear Materials, Vol. 415, Issue 1
New linear plasma devices in the trilateral euregio cluster for an integrated approach to plasma surface interactions in fusion reactors
journal, October 2011
- Unterberg, B.; Jaspers, R.; Koch, R.
- Fusion Engineering and Design, Vol. 86, Issue 9-11
Plasma Characterization in Divertor Simulation Experiments with a V-Shaped Target on GAMMA 10/PDX
journal, May 2013
- Sakamoto, M.; Oki, K.; Nakashima, Y.
- Fusion Science and Technology, Vol. 63, Issue 1T
The Development of the Material Plasma Exposure Experiment
journal, December 2016
- Rapp, Juergen; Biewer, T. M.; Bigelow, T. S.
- IEEE Transactions on Plasma Science, Vol. 44, Issue 12
Plasma source development for fusion-relevant material testing
journal, May 2017
- Caughman, John B. O.; Goulding, Richard H.; Biewer, Theodore M.
- Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 35, Issue 3
Developing the science and technology for the Material Plasma Exposure eXperiment
journal, July 2017
- Rapp, J.; Biewer, T. M.; Bigelow, T. S.
- Nuclear Fusion, Vol. 57, Issue 11
Helicon plasma ion temperature measurements and observed ion cyclotron heating in proto-MPEX
journal, January 2018
- Beers, C. J.; Goulding, R. H.; Isler, R. C.
- Physics of Plasmas, Vol. 25, Issue 1
Heat flux estimates of power balance on Proto-MPEX with IR imaging
journal, August 2016
- Showers, M.; Biewer, T. M.; Caughman, J. B. O.
- Review of Scientific Instruments, Vol. 87, Issue 11
Power accounting of plasma discharges in the linear device Proto-MPEX
journal, April 2018
- Showers, M.; Piotrowicz, P. A.; Beers, C. J.
- Plasma Physics and Controlled Fusion, Vol. 60, Issue 6
Transport simulations of linear plasma generators with the B2.5-Eirene and EMC3-Eirene codes
journal, August 2015
- Rapp, J.; Owen, L. W.; Bonnin, X.
- Journal of Nuclear Materials, Vol. 463
Chapter 6: Scrape-Off Layer Transport on JET
journal, May 2008
- Fundamenski, W.
- Fusion Science and Technology, Vol. 53, Issue 4
Transport modeling of convection dominated helicon discharges in Proto-MPEX with the B2.5-Eirene code
journal, November 2017
- Owen, L. W.; Rapp, J.; Canik, J.
- Physics of Plasmas, Vol. 24, Issue 11
Progress in the Development of a High Power Helicon Plasma Source for the Materials Plasma Exposure Experiment
journal, August 2017
- Goulding, R. H.; Caughman, J. B. O.; Rapp, J.
- Fusion Science and Technology, Vol. 72, Issue 4
Direct measurement of the transition from edge to core power coupling in a light-ion helicon source
journal, May 2018
- Piotrowicz, P. A.; Caneses, J. F.; Showers, M. A.
- Physics of Plasmas, Vol. 25, Issue 5
Helicon normal modes in Proto-MPEX
journal, May 2018
- Piotrowicz, P. A.; Caneses, J. F.; Green, D. L.
- Plasma Sources Science and Technology, Vol. 27, Issue 5
RF compensation of double Langmuir probes: modelling and experiment
journal, May 2015
- Caneses, Juan F.; Blackwell, Boyd
- Plasma Sources Science and Technology, Vol. 24, Issue 3
Improved analysis techniques for cylindrical and spherical double probes
journal, July 2012
- Beal, Brian; Johnson, Lee; Brown, Daniel
- Review of Scientific Instruments, Vol. 83, Issue 7
First results from the Thomson scattering diagnostic on proto-MPEX
journal, August 2016
- Biewer, T. M.; Meitner, S.; Rapp, J.
- Review of Scientific Instruments, Vol. 87, Issue 11
Properties of thin a-C/Si:H coatings applied to TEXTOR
journal, April 1995
- von Seggern, J.; Winter, J.; Grobusch, L.
- Journal of Nuclear Materials, Vol. 220-222
Impurity release and recycling behaviour in TEXTOR-94 with siliconised walls
journal, March 2001
- Philipps, V.; Huber, A.; Esser, H. G.
- Journal of Nuclear Materials, Vol. 290-293
Wall Conditioning on TEXTOR
journal, February 2005
- Philipps, V.
- Fusion Science and Technology, Vol. 47, Issue 2
Pump plenum pressure dependence on divertor plasma parameters and magnetic geometry in the DIII-D tokamak
journal, September 1999
- Maingi, R.; Watkins, J. G.; Mahdavi, M. A.
- Nuclear Fusion, Vol. 39, Issue 9
Ratio of Balmer line intensities resulting from dissociative excitation of molecular hydrogen in an ionizing plasma
journal, September 1989
- Fujimoto, Takashi; Sawada, Keiji; Takahata, Kiyoto
- Journal of Applied Physics, Vol. 66, Issue 6
Evidence for volume recombination in JET detached divertor plasmas
journal, April 1998
- McCracken, G. M.; Stamp, M. F.; Monk, R. D.
- Nuclear Fusion, Vol. 38, Issue 4
Works referencing / citing this record:
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