Abstract
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MHD equilibrium and stability considerations for high-aspect-ratio ARIES-I tokamak reactors .102446 searchabstract .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. ;
Oak Ridge Nat. Lab., TN
This paper appears in: Fusion Engineering, 1989. Proceedings., IEEE Thirteenth Symposium on
Issue Date : 2-6 Oct 1989
On page(s): 1278 - 1282 vol.2
Meeting Date : 02 Oct 1989-06 Oct 1989
INSPEC Accession Number: 3809362
Digital Object Identifier : 10.1109/FUSION.1989.102446
Date of Current Version : 06 August 2002
Abstract
The requirements of (1) an external poloidal-field coil (PFC) system with minimum stored energy, (2) double-null divertor plasmas with elongated D shape, (3) adequate passive stabilization of plasma vertical displacement by a vacuum vessel located behind the blanket zone, and (4) an enhanced plasma beta limit in the first stability regime are incorporated in the Advanced Reactor Innovation and Evaluation Study-I (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 and reduced current drive power by means of ion cyclotron wave or neutral beam injection. These lead to plasmas characterized by an elongation of 1.8 to the divertor X-point, a triangularity of 0.7, a safety factor of ~1.5, a safety factor at the edge >4, a plasma beta of ~2%, and a poloidal beta of ~0.5. With a plasma current of 11 MA, a toroidal field of 13 T at the major radius 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.