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Full-wave simulations of ICRF heating regimes in toroidal plasma with non-Maxwellian distribution functions

Title
Full-wave simulations of ICRF heating regimes in toroidal plasma with non-Maxwellian distribution functions
Author
이정표
Keywords
tokamak; ICRH; waves; plasma; HHFW; minority heating
Issue Date
2017-04
Publisher
IOP PUBLISHING LTD
Citation
NUCLEAR FUSION, v. 57, no. 5, Article no. 056035
Abstract
At the power levels required for significant heating and current drive in magnetically-confined toroidal plasma, modification of the particle distribution function from a Maxwellian shape is likely (Stix 1975 Nucl. Fusion 15 737), with consequent changes in wave propagation and in the location and amount of absorption. In order to study these effects computationally, both the finite-Larmor-radius and the high-harmonic fast wave (HHFW), versions of the full-wave, hot-plasma toroidal simulation code TORIC (Brambilla 1999 Plasma Phys. Control. Fusion 41 1 and Brambilla 2002 Plasma Phys. Control. Fusion 44 2423), have been extended to allow the prescription of arbitrary velocity distributions of the form f(v(parallel to), v(perpendicular to) , psi, theta). For hydrogen (H) minority heating of a deuterium (D) plasma with anisotropic Maxwellian H distributions, the fractional H absorption varies significantly with changes in parallel temperature but is essentially independent of perpendicular temperature. On the other hand, for HHFW regime with anisotropic Maxwellian fast ion distribution, the fractional beam ion absorption varies mainly with changes in the perpendicular temperature. The evaluation of the wave-field and power absorption, through the full wave solver, with the ion distribution function provided by either a Monte-Carlo particle and Fokker-Planck codes is also examined for Alcator C-Mod and NSTX plasmas. Non-Maxwellian effects generally tend to increase the absorption with respect to the equivalent Maxwellian distribution.
URI
https://iopscience.iop.org/article/10.1088/1741-4326/aa66dbhttps://repository.hanyang.ac.kr/handle/20.500.11754/113777
ISSN
0029-5515; 1741-4326
DOI
10.1088/1741-4326/aa66db
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > NUCLEAR ENGINEERING(원자력공학과) > Articles
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