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Y. Liu, X. D. Li, E. Y. Wang, J. Rao,
Y. Yuan, H. Xia, W. M. Xuan, S. W. Xue,
X. T. Ding, G. C. Guo, S. K. Yang, J. L. Luo,
G. Y. Liu, J. E. Zeng, L. F. Xie, M.W. Wang
Z. H. Kang, Z. C. Deng, M. L. Shi, J. Q. Zhang,
W. Y. Hong, L. W. Yan, P. F. Zhao, X. W. Deng
Southwestern Institute of Physics, P.O. Box 432, Chengdu, Sichuan, 610041, China
Abstract. Confinement Studies during LHCD and LHW Ion Heating on HL-1M LHCD
experiments were conducted on HL-1M in the past years. The LHW system is
composed of a 2×12 multijunction launcher and two klystrons of
500kW. The confinement improvement by LHCD was confirmed on HL-1M. The
investigations on the relationship between the confinement and the edge plasma
phenomena were carried out. The confinement improvement seems to be related
with the production of radial electron field during LHCD. Recently several
distinctive phenomena related with plasma confinement were observed during
LHCD. These phenomena include an ELM-like perturbation in boundary plasma and
a sudden collapse of soft-X ray radiation from central plasma. Usually ELM
mode was obtained in divertor configuratin, while on HL-1M the ELM mode was
trigged by LHCD in limiter configuration. Moreover, at high density, distinct
ion heating by LHW was observed. Analyses shows that the parameter decay
instability seems to play a role in the mechanism of the ion heating.
IAEA 2001
