MHD equilibrium and stability considerations for high-aspect-ratio ARIES-I tokamak reactors

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5588780

Peng, Y K.M.; Strickler, D J; Hogan, J T; Whitson, J C; Bathke, C G; Evans, K Jr; Jardin, S C; Klasky, M; Leuer, J A ^[1]

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1. Oak Ridge National Lab., TN (USA)

The requirements of an external poloidal field coil (PFC) system with minimum stored energy, double-null divertor plasmas with elongated D shape, adequate passive stabilization of plasma vertical displacement by a vacuum vessel located behind the blanket zone, and an enhanced plasma beta limit in the first stability regime are incorporated in the ARIES-I concept for a high-field tokamak reactor with high aspect ratio (A = 4.5). The plasma current and pressure profiles are also made consistent with enhanced bootstrap current I{sub bs} and reduced current drive power by means of ion cyclotron wave (ICW) or neutral beam (NB) injection. These lead to plasmas characterized by an elongation k{sub x} of 1.8 to the divertor X-point, a triangularity {delta}{sub x} of 0.7, a safety factor q on axis of q{sub 0} {approx} 1.5, a safety factor at the edge q{sub 95} > 4, a plasma beta {beta} {approx} 2%, and a poloidal beta given by {epsilon}{beta}{sub p} {approx} 0.5 ({epsilon} = 1/A). With a plasma current I{sub p} of 11 MA, a toroidal field B{sub t} of 13 T at the major radius R{sub 0} of 6.5 m, and over 3.5 m of clearance between the PFCs and the plasma edge, the stored energy in the PFC system ranges from 20 GJ during plasma operation at low beta to 12 GJ during plasma operation at high beta. 16 refs., 6 figs., 2 tabs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5588780
• Report Number(s): CONF-891007-22; ON: DE90002152
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
ASPECT RATIO
CLOSED PLASMA DEVICES
CONTAINERS
DIVERTORS
EQUILIBRIUM
INSTABILITY
MHD EQUILIBRIUM
PLASMA INSTABILITY
POLOIDAL FIELD DIVERTORS
PRESSURE VESSELS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES