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Author(s):
K. Ida, K. Kondo, K. Nagasaki T. Hamada, H. Zushi, S. Hidekuma, F. Sano, T. Mizuuchi, H. Okada, S. Besshou, H. Funaba, Y. Kurimoto, K. Watanabe and T. Obiki
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Title:
Dynamics of Ion Temperature in Heliotron-E
Date of publication:
Sep. 1996
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Key words:
Radial Electric Field, Heliotron-E, Charge Exchange Spectroscopy, Pellet Injection
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Abstract:
Ion temperature dynamics related with the density profile are studied in Heliotron-E plasma. The density profiles can be peaked by the H_2 / D_2 pellet injection or flattened by second harmonic electron cyclotron heating (2nd-ECH). Higher ion temperature and better ion transport are observed associated with the density peaking, and a large density gradient results in the radial electric field shear. The improvement of ion transport is more related to the radial electric field shear, rather than to the bulk velocity shear.
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