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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