Velocity-Space Diffusion Coefficients Due to Full-Wave ICRF Fields in Toroidal Geometry

Journal Article · Mon Sep 26 04:00:00 EDT 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2098193· OSTI ID:20726365

Harvey, R W ^[1]; Jaeger, F; Berry, L A; Batchelor, D B; D'Azevedo, E; Carter, M D ^[2]; Ershov, N M; Smirnov, A P ^[3]; Bonoli, P; Wright, J C ^[4]; Smithe, D N ^[5]

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1. CompX, P.O. Box 2672, Del Mar, CA 92014-5672 (United States)
2. ORNL, Oak Ridge, TN (United States)
3. Moscow State Univ. (Russian Federation)
4. PSFC, MIT, Boston, MA (United States)
5. ATK-Mission Research (United States)

Jaeger et al. have calculated bounce-averaged QL diffusion coefficients from AORSA full-wave fields, based on non-Maxwellian distributions from CQL3D Fokker-Planck code. A zero banana-width approximation is employed. Complementing this calculation, a fully numerical calculation of ion velocity diffusion coefficients using the full-wave fields in numerical tokamak equilibria has been implemented to determine the finite orbit width effects. The un-approximated Lorentz equation of motion is integrated to obtain the change in velocity after one complete poloidal transit of the tokamak. Averaging velocity changes over initial starting gyro-phase and toroidal angle gives bounce-averaged diffusion coefficients. The coefficients from the full-wave and Lorentz orbit methods are compared for an ITER DT second harmonic tritium ICRF heating case: the diffusion coefficients are similar in magnitude but reveal substantial finite orbit effects.

• OSTI ID: 20726365
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 787; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BANANA REGIME
CHARGED-PARTICLE TRANSPORT
DIFFUSION
EQUATIONS OF MOTION
FOKKER-PLANCK EQUATION
GEOMETRY
ICR HEATING
ION CYCLOTRON-RESONANCE
IONS
ITER TOKAMAK
PLASMA
RF SYSTEMS
TRITIUM
VELOCITY