Unifying role of radial electric field shear in the confinement trends of TFTR supershot plasmas

被引：49

作者：

Ernst, DR

Coppi, B

Scott, SD

Porkolab, M

机构：

[1] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA

[2] MIT, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.81.2454

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A model is presented to explain the favorable ion thermal confinement trends of supershot plasmas in the Tokamak Fusion Test Reactor (TFTR). Turbulence suppression by radial electric field shear is important to reproduce the measured temperatures. Supershot confinement scalings are reproduced in more than sixty discharges, including favorable core power scaling and variation with isotopic mass, density peakedness, edge recycling, and toroidal rotation. The results connect the transitionless supershot regime with improved confinement regimes which are attained through sharp confinement transitions in the core or edge.

引用

页码：2454 / 2457

页数：4

共 26 条

[1]

BELL R, COMMUNICATION

[2] INFLUENCE OF SHEARED POLOIDAL ROTATION ON EDGE TURBULENCE [J].

BIGLARI, H ;

DIAMOND, PH ;

TERRY, PW .

PHYSICS OF FLUIDS B-PLASMA PHYSICS, 1990, 2 (01) :1-4

[3] Effects of ExB velocity shear and magnetic shear on turbulence and transport in magnetic confinement devices [J].

Burrell, KH .

PHYSICS OF PLASMAS, 1997, 4 (05) :1499-1518

[4] THEORY OF UBIQUITOUS MODE [J].

COPPI, B ;

PEGORARO, F .

NUCLEAR FUSION, 1977, 17 (05) :969-993

[5]

Coppi B., 1993, Plasma Physics and Controlled Nuclear Fusion Research 1992. Proceedings of the Fourteenth International Conference on Plasma Physics and Controlled Nuclear Fusion Research, P131

[6]

CUMMINGS JC, 1996, PLASMA PHYS CONTROLL, V38, pA281

[7] ISOTOPE SCALING AND ETA-I MODE WITH IMPURITIES IN TOKAMAK PLASMAS [J].