Effect of magnetic field configuration on parallel plasma flow during neutral beam injection in Heliotron J

被引：5
|
作者：
Lee, H. [1 ]
Kobayashi, S. [2 ]
Yokoyama, M. [3 ]
Mizuuchi, T. [2 ]
Minami, T. [1 ,2 ]
Harada, T. [1 ]
Nagasaki, K. [2 ]
Okada, H. [2 ]
Minami, T. [1 ,2 ]
Yamamoto, S. [2 ]
Murakami, S. [4 ]
Nakamura, Y. [1 ]
Konoshima, S. [2 ]
Ohshima, S. [2 ]
Zang, L. [1 ]
Sano, F. [2 ]
机构：
[1] Kyoto Univ, Grad Sch Energy Sci, Uji, Kyoto 611011, Japan
[2] Kyoto Univ, Inst Adv Energy, Uji, Kyoto 611011, Japan
[3] Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan
[4] Kyoto Univ, Grad Sch Engn, Kyoto 6068501, Japan
来源：
PLASMA PHYSICS AND CONTROLLED FUSION | 2013年 / 55卷 / 03期
关键词：
TOROIDAL PLASMAS; PLATEAU REGIME; VISCOSITY; TRANSPORT;
D O I：
10.1088/0741-3335/55/3/035012
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The effect of magnetic field configurations on plasma flow velocity was investigated by measuring the parallel flow velocity (v(parallel to)) using a charge-exchange recombination spectroscopy during neutral beam injection in three different toroidal mirror configurations of Heliotron J: high, standard and reversed mirror configurations. The magnetic ripple strengths, gamma, for these mirror configurations were gamma = 0.073 m(-1), 0.031 m(-1) and 0.027 m(-1), respectively, at the normalized averaged minor radius rho = 0.07. The magnetic ripple strength is defined as gamma = {<(partial derivative B/partial derivative l)(2)/B-2 >}(1/2), where <...> is the flux surface averaged value and l is the length along the magnetic field line. At rho = 0.07, the parallel flow velocity in the high mirror configuration (v(parallel to) similar to 4 km s(-1)) was 2-3 times smaller than those in the standard and reversed mirror configurations (v(parallel to) similar to 10-12 km s(-1)). An anticipated interpretation is that the difference in the neoclassical damping force contributes to the difference in v(parallel to) among the three mirror configurations.
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页数：8
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