Physics of slow L-H transitions in the DIII-D tokamak

被引：30

作者：

Colchin, RJ ^{[1
]}

Carreras, BA

Maingi, R

Baylor, LR

Jernigan, TC

Schaffer, MJ

Carlstrom, TN

Brooks, NH

Greenfield, CM

Gohil, P

McKee, GR

Rudakov, DL

Rhodes, TL

Doyle, EJ

Austin, ME

Watkins, JG

机构：

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

[2] Gen Atom Co, San Diego, CA USA

[3] Univ Wisconsin, Madison, WI USA

[4] Univ Calif San Diego, San Diego, CA 92103 USA

[5] Univ Calif Los Angeles, Los Angeles, CA USA

[6] Univ Texas, Austin, TX 78712 USA

[7] Sandia Natl Labs, Albuquerque, NM 87185 USA

来源：

NUCLEAR FUSION | 2002年 / 42卷 / 09期

关键词：

D O I：

10.1088/0029-5515/42/9/312

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：

Details of the low-high (L-H) confinement transition are studied by a new technique which allows for an arbitrarily slow transition between the L- and H-modes on DIII-D. During the transition, the plasma is in an intermediate state (IM-mode) of temperature, density, confinement and edge shear flow. The IM-mode is characterized by periodic bursts of an edge instability, governed by relaxation oscillations, which evolve into type III edge localized modes (ELMs) as the neutral beam heating power is raised. An ELM-free H-mode is achieved when the edge pressure gradient is large enough to support shear flow sufficient to quell the IM-mode edge instability.

引用

页码：1134 / 1143

页数：10

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