Detached divertor operation in DIII-D helium plasmas [electronic resource].
- Published
- Washington, D.C. : United States. Dept. of Energy. Office of Energy Research, 1998.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- 17 pages : digital, PDF file
- Additional Creators
- Lawrence Livermore National Laboratory, United States. Department of Energy. Office of Energy Research, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- This paper presents results from operating helium plasmas in DIII-D in which helium gas puffing is used to reduce the peak divertor heat flux by factors of four or more. The threshold density for achieving these conditions is nearly the same as for deuterium plasmas, which is surprising given the fact that lack of chemical sputtering reduces the carbon concentration in the plasma by more than a factor of five. Spectroscopic analysis shows that helium becomes the primary radiation in these plasmas, which is possible because, unlike carbon, it is the primary species present. These plasmas differ from the usual partially detached divertor (PDD) plasmas in that there is no concomitant reduction in target plate ion flux with target plate heat flux in the scrape off later outside the separatrix.
- Report Numbers
- E 1.99:ucrl-jc--130766
E 1.99: conf-980560--
conf-980560--
ucrl-jc--130766 - Subject(s)
- Other Subject(s)
- Note
- Published through SciTech Connect.
05/01/1998.
"ucrl-jc--130766"
" conf-980560--"
"DE98058595"
"AT5010200"
13. international conference on plasma surface interactions, San Diego, CA (United States), 18-22 May 1998.
Hill, D. N., LLNL. - Funding Information
- W-7405-ENG-48
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