Stability in High Gain Plasmas in DIII-D

Conference · Wed Jan 01 00:00:00 EST 1997

OSTI ID:618165

Lazarus, E. A.; Hong, R. M. ^[1]; Navratil, G. A.; Sabbagh, S. ^[2]; Strait, E. J.; Rice, B. W. ^[3]; Ferron, J. R.; Greenfield, C. M.; Austin, M. E. ^[4]; Chan, V. S.; DeBoo, J. C.; Doyle, E. J. ^[5]; Durst, R. ^[6]; Forest, C. B. ^[7]; Leonard, A. W. ^[8]; Schissel, D. P. ^[9]; Whyte, D. G. ^[10]

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1. Oak Ridge National Lab., TN (United States)
2. Columbia Univ., New York, NY (United States)
3. Lawrence Livermore National Lab., CA (United States)
4. Maryland Univ., College Park, MD (United States)
5. California Univ., Los Angeles, CA (United States
6. Wisconsin Univ., Madison, WI (United States)
7. California Univ., Irvine, CA (United States)
8. Oak Ridge Associated Universities, Inc., TN (United States)
9. JET Joint Undertaking, Abingdon (United Kingdom)
10. INRS -Energie et Materiaux, Varennes, Quebec, Canada

Fusion power gain has been increased by a factor of 3 in DIII-D plasmas through the use of strong discharge shaping and tailoring of the pressure and current density profiles. H-mode plasmas with weak or negative central magnetic shear are found to have neoclassical ion confinement throughout most of the plasma volume. Improved MHD stability is achieved by controlling the plasma pressure profile width. The highest fusion power gain Q (ratio of fusion power to input power) in deuterium plasmas was 0.0015. which extrapolates to an equivalent Q of 0.32 in a deuterium-tritium plasma and is similar to values achieved in tokamaks of larger size and magnetic fields.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: AC03-89ER51114; AC05-96OR22464; FG05-88ER53266; W-7405-ENG-48
• OSTI ID: 618165
• Report Number(s): CONF-9710100-1; ON: DE97009362; BR: AT5010200; TRN: AD-A332 07
• Resource Relation: Conference: 16. International Atomic Energy Agency (IAEA) fusion energy conference, Montreal (Canada), 7-11 Oct 1997; Other Information: DN: Presented at 16th IAEA Fusion Energy Conference, Montreal, Canada, 7-11 Oct97; PBD: 1997
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
MAGNETIC FIELDS
STABILITY
DEUTERIUM
TRITIUM
GAIN
H-MODE PLASMA CONFINEMENT
PLASMA INSTABILITY
TOKAMAK DEVICES
MAGNETOHYDRODYNAMICS
PLASMA PRESSURE