Stability in high gain plasmas in DIII-D

Conference · Tue Oct 01 00:00:00 EDT 1996

OSTI ID:451249

Lazarus, E A; Houlberg, W A; Murakami, M; Wade, M R ^[1]

---

1. and others

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: General Atomics, San Diego, CA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Columbia Univ., New York, NY (United States); Univ. of Wisconsin, Madison, WI (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Texas Univ., Austin, TX (United States). Fusion Research Center; Univ. of California, Los Angeles, CA (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: AC03-89ER51114; AC05-96OR22464; FG02-89ER53297; FC03-86ER52126; FG05-88ER53266; FG02-92ER54139; W-7405-ENG-48
• OSTI ID: 451249
• Report Number(s): GA-A22489; CONF-961005-22; ON: DE97003827; TRN: 97:006573
• Resource Relation: Conference: 16. International Atomic Energy Agency (IAEA) international conference on plasma physics and controlled nuclear fusion research, Montreal (Canada), 7-11 Oct 1996; Other Information: PBD: Oct 1996
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
DOUBLET-3 DEVICE
H-MODE PLASMA CONFINEMENT
MHD EQUILIBRIUM
CURRENT DENSITY
SHEAR
PLASMA INSTABILITY