SciTech Connect

Title: CONTROL OF MHD STABILITY IN DIII-D ADVANCED TOKAMAK DISCHARGES

CONTROL OF MHD STABILITY IN DIII-D ADVANCED TOKAMAK DISCHARGES 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.
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Publication Date:
OSTI Identifier:821565
DOE Contract Number:AC03-99ER54463
Resource Type:Conference
Data Type:
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
Research Org:GENERAL ATOMICS (US)
Sponsoring Org:(US)
Country of Publication:United States
Language:English
Subject: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BOOTSTRAP CURRENT; DOUBLET-3 DEVICE; PHYSICS; PLASMA; PLASMA PRESSURE; POWER DENSITY; PRODUCTION; STABILITY; THERMONUCLEAR REACTORS