Fast-ion losses due to high-frequency MHD perturbations in the ASDEX upgrade tokamak

被引：71

作者：

Garcia-Munoz, M. ^{[1
]}

Fahrbach, H. -U. ^{[1
]}

Guenter, S. ^{[1
]}

Igochine, V. ^{[1
]}

Mantsinen, M. J. ^{[1
,4
]}

Maraschek, M. ^{[1
]}

Martin, P. ^{[2
,3
]}

Piovesan, P. ^{[2
,3
]}

Sassenberg, K. ^{[1
,5
]}

Zohm, H. ^{[1
]}

机构：

[1] EURATOM, Max Planck Inst Plasmaphys, D-85748 Garching, Germany

[2] Assoc EURATOM ENEA Fus, Consorzio RFX, Padua, Italy

[3] Univ Padua, Dept Phys, I-35100 Padua, Italy

[4] Helsinki Univ Technol, Assoc Euratom Tekes, FIN-02015 Espoo, Finland

[5] Dublin City Univ, Natl Univ Ireland Univ Coll Cork, Assoc EURATOM, Cork, Ireland

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.100.055005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Time-resolved energy and pitch angle measurements of fast-ion losses correlated in frequency and phase with high-frequency magnetohydrodynamic perturbations have been obtained for the first time in a magnetic fusion device and are presented here. A detailed analysis of fast-ion losses due to toroidal Alfven eigenmodes has revealed the existence of a new core-localized magnetohydrodynamic perturbation, the sierpes mode. The sierpes mode is a non-Alfvenic instability which dominates the losses of fast ions in ion cyclotron resonance heated discharges, and it is named for its footprint in the spectrograms ("sierpes" means "snake" in Spanish). The sierpes mode has been reconstructed by means of highly resolved multichord soft-x-ray measurements.

引用

页数：4

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