Generation and confinement of hot ions and electrons in a reversed-field pinch plasma

被引：16

作者：

Chapman, B. E. ^{[1
]}

Almagri, A. F. ^{[1
]}

Anderson, J. K. ^{[1
]}

Brower, D. L. ^{[2
]}

Caspary, K. J. ^{[1
]}

Clayton, D. J. ^{[1
]}

Craig, D. ^{[3
]}

Den Hartog, D. J. ^{[1
]}

Ding, W. X. ^{[2
]}

Ennis, D. A. ^{[1
]}

Fiksel, G. ^{[1
]}

Gangadhara, S. ^{[1
]}

Kumar, S. ^{[1
]}

Magee, R. M. ^{[1
]}

O'Connell, R. ^{[1
]}

Parke, E. ^{[1
]}

Prager, S. C. ^{[1
]}

Reusch, J. A. ^{[1
]}

Sarff, J. S. ^{[1
]}

Stephens, H. D. ^{[1
]}

Yang, Y. M. ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[2] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[3] Wheaton Coll, Wheaton, IL 60187 USA

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2010年 / 52卷 / 12期

关键词：

TOKAMAK-LIKE CONFINEMENT; HIGH-BETA; FLUCTUATIONS; TEMPERATURE; TRANSPORT; IMPROVEMENT;

D O I：

10.1088/0741-3335/52/12/124048

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：

By manipulating magnetic reconnection in Madison Symmetric Torus (MST) discharges, we have generated and confined for the first time a reversed-field pinch (RFP) plasma with an ion temperature > 1 keV and an electron temperature of 2 keV. This is achieved at a toroidal plasma current of about 0.5 MA, approaching MST's present maximum. The manipulation begins with intensification of discrete magnetic reconnection events, causing the ion temperature to increase to several kiloelectronvolts. The reconnection is then quickly suppressed with inductive current profile control, leading to capture of a portion of the added ion heat with improved ion energy confinement. Electron energy confinement is simultaneously improved, leading to a rapid ohmically driven increase in the electron temperature. A steep electron temperature gradient emerges in the outer region of the plasma, with a local thermal diffusivity of about 2m(2) s(-1). The global energy confinement time reaches 12 ms, the largest value yet achieved in the RFP and which is roughly comparable to the H-mode scaling prediction for a tokamak with the same plasma current, density, heating power, size and shape.

引用

页数：14

共 50 条

[1] Equilibrium reconstruction in the Madison Symmetric Torus reversed field pinch [J].