Identification of zonal flows in a toroidal plasma

被引：300

作者：

Fujisawa, A

Itoh, K

Iguchi, H

Matsuoka, K

Okamura, S

Shimizu, A

Minami, T

Yoshimura, Y

Nagaoka, K

Takahashi, C

Kojima, M

Nakano, H

Ohsima, S

Nishimura, S

Isobe, M

Suzuki, C

Akiyama, T

Ida, K

Toi, K

Itoh, SI

Diamond, PH

机构：

[1] Natl Inst Fus Sci, Toki 50952, Japan

[2] Kyushu Univ, RIAM, Kasuga, Fukuoka 816, Japan

[3] Univ Calif San Diego, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.93.165002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

This Letter presents experimental confirmation of the presence of zonal flows in magnetically confined toroidal plasma using an advanced diagnostic system-dual heavy ion beam probes. The simultaneous observation of an electric field at two distant toroidal locations (similar to1.5 m apart) in the high temperature (similar to1 keV) plasma provides a fluctuation spectrum of electric field (or flow), a spatiotemporal structure of the zonal flows (characteristic radial length of similar to1.5 cm and lifetime of similar to1.5 ms), their long-range correlation with toroidal symmetry (n=0), and the difference in the zonal flow amplitude with and without a transport barrier. These constitute essential elements of turbulence-zonal flow systems, and illustrate one of the fundamental processes of structure formation in nature.

引用

页码：165002 / 1

页数：4

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