Measurement of pressure-gradient-driven currents in tokamak edge plasmas

被引：63

作者：

Thomas, DM

Leonard, AW

Lao, LL

Osborne, TH

Mueller, HW

Finkenthal, DF

机构：

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

[2] Max Planck Inst Plasma Phys, D-85748 Garching, Germany

[3] Palomar Coll, San Marcos, CA 92069 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.93.065003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Localized currents driven by pressure gradients play a pivotal role in the magnetohydrodynamic stability of toroidal plasma confinement devices. We have measured the currents generated in the edge of L- (low) and H- (high confinement) mode discharges on the DIII-D tokamak, utilizing the Zeeman effect in an injected lithium beam to obtain high resolution profiles of the poloidal magnetic field. We find current densities in excess of 1 MA/m(2) in a 1 to 2 cm region near the peak of the edge pressure gradient. These values are sufficient to challenge edge stability theories based on specific current formation models.

引用

页码：065003 / 1

页数：4

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