Active feedback stabilization of the resistive wall mode on the DIII-D device

被引：113

作者：

Okabayashi, M ^{[1
]}

Bialek, J ^{[1
]}

Chance, MS ^{[1
]}

Chu, MS ^{[1
]}

Fredrickson, ED ^{[1
]}

Garofalo, AM ^{[1
]}

Gryaznevich, M ^{[1
]}

Hatcher, RE ^{[1
]}

Jensen, TH ^{[1
]}

Johnson, LC ^{[1
]}

La Haye, RJ ^{[1
]}

Lazarus, EA ^{[1
]}

Makowski, MA ^{[1
]}

Manickam, J ^{[1
]}

Navratil, GA ^{[1
]}

Scoville, JT ^{[1
]}

Strait, EJ ^{[1
]}

Turnbull, AD ^{[1
]}

Walker, ML ^{[1
]}

机构：

[1] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

来源：

PHYSICS OF PLASMAS | 2001年 / 8卷 / 05期

关键词：

D O I：

10.1063/1.1351823

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

A proof of principle magnetic feedback stabilization experiment has been carried out to suppress the resistive wall mode (RWM), a branch of the ideal magnetohydrodynamic (MHD) kink mode under the influence of a stabilizing resistive wall, on the DIII-D tokamak device [Plasma Phys. Controlled Fusion Research (International Atomic Energy Agency, Vienna, 1986), p. 159; Phys. Plasmas 1, 1415 (1994)]. The RWM was successfully suppressed and the high beta duration above the no-wall limit was extended to more than 50 times the resistive wall flux diffusion time. It was observed that the mode structure was well preserved during the time of the feedback application. Several lumped parameter formulations were used to study the feedback process. The observed feedback characteristics are in good qualitative agreement with the analysis. These results provide encouragement to future efforts towards optimizing the RWM feedback methodology in parallel to what has been successfully developed for the n=0 vertical positional control. Newly developed MHD codes have been extremely useful in guiding the experiments and in providing possible paths for the next step. (C) 2001 American Institute of Physics.

引用

页码：2071 / 2082

页数：12

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