Plasma and Fusion Research
Volume 5, S2084 (2010)
Regular Articles
- Plasma Research Center, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8577, Japan
Abstract
Neutral beam injection heating has been studied for high-density mode plasma in the GAMMA 10 tandem mirror. During NBI heating, the increase in diamagnetism was found to be larger for the high-density mode plasma than the hot-ion mode plasma. A numerical model using zero-dimensional particles and energy balance equations was developed to investigate NBI heating in the central cell area. The evolution of total energy density was found to be consistent with that of diamagnetism in the low-density hot-ion mode. The initial ion temperature is a key parameter for enhancing beam heating. In high-density mode, discrepancies were found between the measured diamagnetism and the calculated total energy density. It is probably because that time behavior of the electron temperature is not suitable.
Keywords
NBI, GAMMA 10, tandem mirror, hot-ion mode, high-density mode
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This paper may be cited as follows:
Hiroki OZAWA, Yousuke NAKASHIMA, Ryou YONENAGA, Katsuhiro HOSOI, Takashi ISHII, Hisato TAKEDA, Kazuo OKAWA and Tsuyoshi IMAI, Plasma Fusion Res. 5, S2084 (2010).