Feedback control of the safety factor profille evolution during formation of an advanced tokamak discharge

被引：46

作者：

Ferron, J. R.

Gohill, P.

Greenfield, C. M.

Lohr, J.

Luce, T. C.

Makowski, M. A.

Mazon, D.

Murakami, M.

Petty, C. C.

Politzer, P. A.

Wade, M. R.

机构：

[1] Gen Atom Co, San Diego, CA 92186 USA

[2] Lawrence Livermore Natl Lab, Livermore, CA USA

[3] EURATOM, CEA, CEA Cadarache, St Paul Les Durance, France

[4] Oak Ridge Natl Lab, Oak Ridge, TN USA

来源：

NUCLEAR FUSION | 2006年 / 46卷 / 10期

关键词：

D O I：

10.1088/0029-5515/46/10/L01

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：

Active feedback control for regulation of the safety factor (q) profile at the start of the high stored energy phase of an advanced tokamak discharge has been demonstrated in the DIII-D tokamak. The time evolution of the on-axis or minimum value of q is controlled during and just following the period of ramp-up of the plasma current using electron heating to modify the rate of relaxation of the current profile. In L-mode and H-mode discharges, feedback control of q is effective with the appropriate choice of either off-axis electron cyclotron heating or neutral beam heating as the actuator. The q profile is calculated in real time from a complete equilibrium reconstruction fitted to external magnetic field and flux measurements and internal poloidal field measurements from the motional Stark effect diagnostic.

引用

页码：L13 / L17

页数：5

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