Configuration Effect on LH Transition in Tohoku University Heliac
Hiromi Takahashia), Sumio Kitajimaa), Masayuki Yokoyamab), Yutaka Tanakaa),
a) Department of Quantum Science and Energy Engineering, Tohoku University, Aramaki, Aoba, Sendai, Miyagi, 980-8578, Japan
In Tohoku University Heliac, a strong negative radial electric field is successfully formed by a negatively biased hot cathode of LaB6, and the bifurcation phenomena of radial electric field are clearly observed [1, 2]. Measured driving forces for poloidal rotation due to j×B qualitatively agree well with the neoclassical theory with a standard magnetic configuration (magnetic axis position Rax = 79mm), which has good poloidal symmetry. In order to study the influence of poloidal viscosity on LH transition, experiments with different magnetic configurations are carried out.
References
[1]S. Kitajima et al., Int. J. Appl. Electromagnetics and Mechanics, 13, 381 (2002)
[2]S. Kitajima et al., IEEE Conference Record of 2003 IEEE International Conference on Plasma Science, 465 (2003)
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