Plasma and Fusion Research

Volume 3, S1081 (2008)

Regular Articles

Time-Dependent NBI-Heating Simulation of LHD Plasmas Using Toroidal Transport Analysis Linkage Code
Takumi OHNISHI, Kozo YAMAZAKI, Hisamichi FUNABA1), Hideki ARIMOTO and Tatsuo SHOJI
Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
1)
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
(Received 19 November 2007 / Accepted 4 March 2008 / Published 1 August 2008)

Abstract

Time-dependent simulation of neutral-beam-heated LHD plasmas has been carried out using the Toroidal Transport Analysis Linkage (TOTAL) simulation code focusing on the time evolutions of beam energy and kinetic energy. This code consists of three-dimensional equilibrium VMEC with bootstrap currents and a onedimensional transport HTRANS with neoclassical loss determined by ambipolar radial electric field as well as anomalous transport. Neutral beam deposition is calculated using the Monte Carlo code HFREYA, and the slowing down process was calculated using the Fast Ion Fokker-Plank code FIFPC. The simulated time evolution of total energy, including beam energy, roughly agrees with the time evolution of the experimentally measured energy. The temporal change in the beam velocity distribution is also clarified.

Keywords

NBI-heating, LHD, Fokker-Plank equation, velocity distribution function, neoclassical transport, anomalous transport

DOI: 10.1585/pfr.3.S1081

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This paper may be cited as follows:

Takumi OHNISHI, Kozo YAMAZAKI, Hisamichi FUNABA, Hideki ARIMOTO and Tatsuo SHOJI, Plasma Fusion Res. 3, S1081 (2008).