Observation and explanation of the JET n=0 chirping mode

被引：72

作者：

Boswell, C. J.

Berk, H. L.

Borba, D. N.

Johnson, T.

Pinches, S. D.

Sharapov, S. E.

机构：

[1] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA

[2] Univ Texas, Inst Fus Studies, Austin, TX 78712 USA

[3] Inst Super Tecn, Ctr Fusao Nucl Assoc Euratom, P-1049001 Lisbon, Portugal

[4] Culham Sci Ctr, EFDA Close Support Unit, Abingdon OX14 3DB, Oxon, England

[5] KTH, Euratom VR Assoc, Alfven Lab, Stockholm, Sweden

[6] EURATOM, Max Planck Inst Plasma Phys, D-85748 Garching, Germany

[7] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

来源：

PHYSICS LETTERS A | 2006年 / 358卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

geodesic acoustic mode; phase-space structures;

D O I：

10.1016/j.physleta.2006.05.030

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Persistent rapid up and down frequency chirping modes with a toroidal mode number of zero (n = 0) have been observed in the JET tokamak when energetic ions, with a mean energy similar to 500 keV, were created by high field side ion cyclotron resonance frequency heating. This heating method enables the formation of an energetically inverted ion distribution function that allows ions to spontaneously excite the observed instability, identified as a global geodesic acoustic mode. The interpretation is that phase space structures form and interact with the fluid zonal flow to produce the pronounced frequency chirping. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：154 / 158

页数：5

共 19 条

[1] Spontaneous hole-clump pair creation in weakly unstable plasmas [J].