Electron thermal transport barrier and magnetohydrodynamic activity observed in Tokamak plasmas with negative central shear

被引：91

作者：

deBaar, MR

Hogeweij, GMD

Cardozo, NJL

Oomens, AAM

Schuller, FC

机构：

[1] FOM Instituut voor Plasmafysica “Rijnhuizen”, Association EURATOM-FOM, Nieuwegein, 3430

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.78.4573

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In the Rijnhuizen Tokamak Project, plasmas with steady-state negative central shear (NCS) are made with off-axis electron cyclotron heating. Shifting the power deposition by 2 mm results in a sharp transition of confinement. The good confinement branch features a transport barrier at the off-axis minimum of the safety factor (q), where q less than or equal to 3, and two magnetohydrodynamic (MHD) instabilities, where one is localized at the off-axis minimum of q and one covers the entire NCS region. The low confinement branch has q > 3 everywhere, no transport barrier, and no MHD activity.

引用

页码：4573 / 4576

页数：4

共 16 条

[1]

Biskamp D, 1993, Nonlinear Magnetohydrodynamics

[2] THEORETICAL-ANALYSIS OF THE ROLE OF THE INFERNAL MODE IN THE STABILITY OF PEAKED PRESSURE PROFILES IN PELLET FUELED JET DISCHARGES [J].

CHARLTON, LA ;

BAYLOR, LR ;

EDWARDS, AW ;

HAMMETT, GW ;

HOULBERG, WA ;

KUPSCHUS, P ;

LYNCH, VE ;

MILORA, SL ;

OROURKE, J ;

SCHMIDT, GL .

NUCLEAR FUSION, 1991, 31 (10) :1835-1842

[3] Resistive interchange modes in negative central shear tokamaks with peaked pressure profiles [J].

Chu, MS ;

Greene, JM ;

Lao, LL ;

Miller, RL ;

Bondeson, A ;

Sauter, O ;

Rice, BW ;

Strait, EJ ;

Taylor, TS ;

Turnbull, AD .

PHYSICAL REVIEW LETTERS, 1996, 77 (13) :2710-2713

[4]

DACRUZ DF, 1993, THESIS RIJKSUNIVERSI

[5] Steady-state hollow electron temperature profiles in the Rijnhuizen Tokamak Project [J].

Hogeweij, GMD ;

Oomens, AAM ;

Barth, CJ ;

Beurskens, MNA ;

Chu, CC ;

vanGelder, JFM ;

Lok, J ;

Cardozo, NJL ;

Pijper, FJ ;

Polman, RW ;

Rommers, JH .

PHYSICAL REVIEW LETTERS, 1996, 76 (04) :632-635

[6] SHEAR REVERSAL AND MHD ACTIVITY DURING PELLET ENHANCED PERFORMANCE PULSES IN JET [J].

HUGON, M ;

VANMILLIGEN, BP ;

SMEULDERS, P ;

APPEL, LC ;

BARTLETT, DV ;

BOUCHER, D ;

EDWARDS, AW ;

ERIKSSON, LG ;

GOWERS, CW ;

HENDER, TC ;

HUYSMANS, G ;

JACQUINOT, JJ ;

KUPSCHUS, P ;

PORTE, L ;

REBUT, PH ;

START, DFH ;

TIBONE, F ;

TUBBING, BJD ;

WATKINS, ML ;

ZWINGMANN, W .

NUCLEAR FUSION, 1992, 32 (01) :33-43

[7] IMPROVED PLASMA PERFORMANCE IN TOKAMAKS WITH NEGATIVE MAGNETIC SHEAR [J].

KESSEL, C ;

MANICKAM, J ;

REWOLDT, G ;

TANG, WM .

PHYSICAL REVIEW LETTERS, 1994, 72 (08) :1212-1215

[8] IMPROVED CONFINEMENT WITH REVERSED MAGNETIC SHEAR IN TFTR [J].

LEVINTON, FM ;

ZARNSTORFF, MC ;

BATHA, SH ;

BELL, M ;

BELL, RE ;

BUDNY, RV ;

BUSH, C ;

CHANG, Z ;

FREDRICKSON, E ;

JANOS, A ;

MANICKAM, J ;

RAMSEY, A ;

SABBAGH, SA ;

SCHMIDT, GL ;

SYNAKOWSKI, EJ ;

TAYLOR, G .

PHYSICAL REVIEW LETTERS, 1995, 75 (24) :4417-4420

[9]

LITAUDON X, 1996, 1565 EURCEAFC

[10]

NEYATANI Y, IN PRESS

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