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The role of shaping in achieving high performance in DIII-D [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1994.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
16 pages : digital, PDF file
Additional Creators
General Atomic Company, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Experiments to study the effect of plasma shape on performance show that the high performance levels characteristic of VH-mode plasmas are only obtained for high triangularity (δ). A characteristic difference in central heating efficiency is observed when high and low δ plasmas are compared. The authors find this difference to correlate well with the attainment of Mercier stability. The core plasma for the high δ cases achieves Mercier stability when q₀ rises above a critical value which depends on δ, providing direct access to the second-stable regime. Other attributes of the VH-mode commence after a delay. The rise in q₀ is attributable to the radial gradients in the neutral beam and bootstrap current sources. Simulation indicates that such plasmas would persist for many seconds if the rise in density could be controlled, maintaining a centrally peaked neutral beam deposition profile.
Report Numbers
E 1.99:ga-a--21807
E 1.99: iaea-cn--60/a-5-i-1
E 1.99: conf-940933--23
conf-940933--23
iaea-cn--60/a-5-i-1
ga-a--21807
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Note
Published through SciTech Connect.
10/01/1994.
"ga-a--21807"
" iaea-cn--60/a-5-i-1"
" conf-940933--23"
"DE95003877"
"35AT10020/35AT15040"
"GB0103012"
"AT101014Z"
"AT051013C/AT0520210"
15. international conference on plasma physics and controlled nuclear fusion research,Madrid (Spain),26 Sep - 1 Oct 1994.
Osborne, T.H.; Hyatt, A.W.; Lazarus, E.A.
Funding Information
AC03-89ER51114
AC05-84OR21400
W-7405-ENG-48
AC04-94AL85000
FG03-89ER51121
FG03-86ER53225
View MARC record | catkey: 14745368