Observation of Long-Distance Radial Correlation in Toroidal Plasma Turbulence

被引：67

作者：

Inagaki, S. ^{[1
,2
]}

Tokuzawa, T. ^{[3
]}

Itoh, K. ^{[2
,3
]}

Ida, K. ^{[2
,3
]}

Itoh, S. -I. ^{[1
,2
]}

Tamura, N. ^{[3
]}

Sakakibara, S. ^{[3
]}

Kasuya, N. ^{[2
,3
]}

Fujisawa, A. ^{[1
,2
]}

Kubo, S. ^{[3
]}

Shimozuma, T. ^{[3
]}

Ido, T. ^{[3
]}

Nishimura, S. ^{[3
]}

Arakawa, H. ^{[4
]}

Kobayashi, T. ^{[4
]}

Tanaka, K. ^{[3
]}

Nagayama, Y. ^{[3
]}

Kawahata, K. ^{[3
]}

Sudo, S. ^{[3
]}

Yamada, H. ^{[3
]}

Komori, A. ^{[3
]}

机构：

[1] Kyushu Univ, Appl Mech Res Inst, Fukuoka 8168580, Japan

[2] Kyushu Univ, Itoh Res Ctr Plasma Turbulence, Kasuga, Fukuoka 8168580, Japan

[3] Natl Inst Fus Sci, Gifu 5025292, Japan

[4] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Kasuga, Fukuoka 8168580, Japan

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 11期

关键词：

LARGE HELICAL DEVICE; ELECTRON-TEMPERATURE FLUCTUATIONS; HEAT-PULSE-PROPAGATION; ZONAL FLOWS; TFR TOKAMAK; TRANSPORT; LHD; OSCILLATIONS; DYNAMICS; W7-AS;

D O I：

10.1103/PhysRevLett.107.115001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

This Letter presents the discovery of macroscale electron temperature fluctuations with a long radial correlation length comparable to the plasma minor radius in a toroidal plasma. Their spatiotemporal structure is characterized by a low frequency of similar to 1-3 kHz, ballistic radial propagation, a poloidal or toroidal mode number of m/n = 1/1 (or 2/1), and an amplitude of similar to 2% at maximum. Nonlinear coupling between the long-range fluctuations and the microscopic fluctuations is identified. A change of the amplitude of the long-range fluctuation is transmitted across the plasma radius at the velocity which is of the order of the drift velocity.

引用

页数：5

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