Modeling of Time-dependent Radial Transport of Electron Distribution Perturbations Caused by ECCD in DIII-D

Journal Article · Fri Sep 28 00:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2800515· OSTI ID:21035890

Harvey, R W ^[1]; Prater, R; Petty, C C ^[2]

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1. CompX, P.O. Box 2672, Del Mar, CA, 92014 (United States)
2. General Atomics, San Diego, CA 92186-5608 (United States)

In strongly driven ECCD experiments, consideration of radial transport can be crucial for accurate modeling of otherwise localized electron cyclotron current drive. The DIII-D experiment is in an intermediate driven regime with t{sub transport}{approx}t{sub slowing} for the EC driven electrons. We report computational results from the CQL3D Fokker-Planck simulation code showing radial spreading of driven ECCD in DIII-D. Progress on implementation of a new iterative sparse matrix fully-implicit solve for the full 3D electron distribution, f(u,{theta}{sub u},{rho},t) and toroidal electric potential, V{sub loop({rho},t)} is described. We give a new algorithm for implicit determination of the self-consistent solution of the Ampere-Faraday equation for the time-dependent toroidal electric field.

• OSTI ID: 21035890
• Journal Information: AIP Conference Proceedings, Vol. 933, Issue 1; Conference: 17. topical conference on radio frequency power in plasmas, Clearwater, FL (United States), 7-9 May 2007; Other Information: DOI: 10.1063/1.2800515; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALGORITHMS
C CODES
COMPUTERIZED SIMULATION
DISTRIBUTION
DISTURBANCES
DOUBLET-3 DEVICE
ECR CURRENT DRIVE
ELECTRIC FIELDS
ELECTRIC POTENTIAL
ELECTRONS
FOKKER-PLANCK EQUATION
ITERATIVE METHODS
MATHEMATICAL SOLUTIONS
PLASMA
PLASMA SIMULATION
RADIATION TRANSPORT
RF SYSTEMS
TIME DEPENDENCE