Stationary, high bootstrap fraction plasmas in DIII-D without inductive current control

被引：54

作者：

Politzer, PA

Hyatt, AW

Luce, TC

Perkins, FW

Prater, R

Turnbull, AD

Brennan, DP

Ferron, JR

Greenfield, CM

Jayakumar, J

La Haye, RJ

Petty, CC

Wade, MR

机构：

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

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

[3] Oak Ridge Inst Sci Educ, Oak Ridge, TN 37831 USA

[4] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA

[5] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

来源：

NUCLEAR FUSION | 2005年 / 45卷 / 06期

关键词：

D O I：

10.1088/0029-5515/45/6/002

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：

We have initiated an experimental programme to address some of the questions associated with the operation of a tokamak with high bootstrap current fraction under high performance conditions, without assistance from a transformer. In these discharges, stationary (or slowly improving) conditions are maintained for up to 3.7 s at beta(N) approximate to beta(p) approaching 3.3. The achievable current and pressure are limited by a relaxation oscillation, involving Growth and collapse of an internal transport barrier at rho >= 0.6. The pressure gradually increases and the current profile broadens throughout the discharge. Eventually the plasma reaches a more stable, high confinement (H-89P similar to 3) state. Characteristically these plasmas have 65-85% bootstrap current, 15-30% neutral-beam-driven current and 0-10% driven by electron cyclotron frequency electromagnetic waves.

引用

页码：417 / 424

页数：8

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