Experimental evidence of a zonal magnetic field in a toroidal plasma

被引：39
|
作者：
Fujisawa, A.
Itoh, K.
Shimizu, A.
Nakano, H.
Ohshima, S.
Iguchi, H.
Matsuoka, K.
Okamura, S.
Minami, T.
Yoshimura, Y.
Nagaoka, K.
Ida, K.
Toi, K.
Takahashi, C.
Kojima, M.
Nishimura, S.
Isobe, M.
Suzuki, C.
Akiyama, T.
Nagashima, Y.
Itoh, S.-I.
Diamond, P. H.
机构：
[1] Natl Inst Fus Sci, Toki 50952, Japan
[2] Kyushu Univ, RIAM, Kasuga, Fukuoka 8168580, Japan
[3] Univ Calif San Diego, La Jolla, CA 92093 USA
来源：
PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 16期
关键词：
D O I：
10.1103/PhysRevLett.98.165001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A zonal magnetic field is found in a toroidal plasma. The magnetic field has a symmetric bandlike structure, which is uniform in the toroidal and poloidal directions and varies radially with a finite wavelength of mesoscale, which is analogous to zonal flows. A time-dependent bicoherence analysis reveals that the magnetic field should be generated by the background plasma turbulence. The discovery is classified as a new kind of phenomenon of structured magnetic field generation, giving insight into phenomena such as dipole field generation in rotational planets.
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页数：4
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