CONTROL OF MHD STABILITY IN DIII-D ADVANCED TOKAMAK DISCHARGES

Conference · Sun Jun 01 00:00:00 EDT 2003

OSTI ID:821565

STRAIT, EJ; BIALEK, J; CHANCE, MS; CHU, MS; EDGELL, DH; FERRON, JR; GREENFIELD, CM; GAROFALO, AM; HUMPHREYS, DA; JACKSON, GL; JAYAKUMAR, RJ; JERNIGAN, TC; KIM, JS; LA HAYE, RJ; LAO, LL; LUCE, TC; MAKOWSKI, MA; MURAKAMI, M; NAVRATIL, GA; OKABAYASHI, M ; PETTY, CC; REIMERDES, H; SCOVILLE, JT; TURNBULL, AD; WADE, MR; WALKER, ML; WHYTE, DG

OAK-B135 Advanced tokamak research in DIII-D seeks to optimize the tokamak approach for fusion energy production, leading to a compact, steady state power source. High power density implies operation at high toroidal beta, {beta}{sub T}=<p>2{micro}{sub 0}/B{sub T}{sup 2}, since fusion power density increases roughly as the square of the plasma pressure. Steady-state operation with low recirculating power for current drive implies operation at high poloidal beta, {beta}{sub P} = <p>2{micro}{sub 0}/<B{sub P}>{sup 2}, in order to maximize the fraction of self-generated bootstrap current. Together, these lead to a requirement of operation at high normalized beta, {beta}{sub N} = {beta}{sub T}(aB/I), since {beta}{sub P}{beta}{sub T} {approx} 25[(1+{kappa}{sup 2})/2] ({beta}{sub N}/100){sup 2}. Plasmas with high normalized beta are likely to operate near one or more stability limits, so control of MHD stability in such plasmas is crucial.

• Research Organization: General Atomics, San Diego, CA (United States)
• Sponsoring Organization: (US)
• DOE Contract Number: AC03-99ER54463
• OSTI ID: 821565
• Resource Relation: Conference: 30TH EUROPEAN PHYSICAL SOCIETY CONFERENCE ON CONTROLLED FUSION AND PLASMA PHYSICS, St.PETERSBURG (RU), 07/07/2003--07/11/2003; Other Information: PBD: 1 Jun 2003
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BOOTSTRAP CURRENT
DOUBLET-3 DEVICE
PHYSICS
PLASMA
PLASMA PRESSURE
POWER DENSITY
PRODUCTION
STABILITY
THERMONUCLEAR REACTORS