Observations of enhanced core confinement in negative magnetic shear discharges with an L mode edge on DIII-D

被引：47

作者：

Rice, BW ^{[1
]}

Lazarus, EA ^{[1
]}

Austin, ME ^{[1
]}

Burrell, KH ^{[1
]}

Casper, TA ^{[1
]}

Groebner, RJ ^{[1
]}

Gohil, P ^{[1
]}

Forest, CB ^{[1
]}

Ikezi, H ^{[1
]}

Lao, LL ^{[1
]}

Mauel, ME ^{[1
]}

Navratil, GA ^{[1
]}

Stallard, BW ^{[1
]}

Strait, EJ ^{[1
]}

Taylor, TS ^{[1
]}

机构：

[1] GEN ATOM CO,SAN DIEGO,CA

来源：

NUCLEAR FUSION | 1996年 / 36卷 / 10期

关键词：

D O I：

10.1088/0029-5515/36/10/I12

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：

Plasma discharges with negative central magnetic shear (NCS) and access to the ballooning second stability regime have been produced on DIII-D with edge plasma conditions similar to those in the standard L mode confinement regime. Confinement enhancement factors up to H drop tau(E)/tau(ITER-89P) similar to 2.5 are obtained while maintaining the L mode edge. Compared with discharges with monotonic q profiles, highly peaked toroidal rotation (f(phi)(0) approximate to 30-70 kHz), ion temperature (T-i(0) approximate to 15-22 keV) and density (n(e)(0)/(n) over tilde(e) approximate to 2.2) profiles are observed. This regime has yielded the highest DD neutron rates observed to date on DIII-D. Steep pressure gradients drive a large bootstrap current, with up to similar to 75% total non-inductive current drive. These features make this an attractive advanced tokamak operating regime for further study.

引用

页码：1271 / 1280

页数：10

共 28 条

[11] NONINDUCTIVELY CURRENT-DRIVEN H-MODE WITH HIGH BETA(N)-VALUES AND HIGH BETA(P)-VALUES IN JT-60U
KAMADA, Y
USHIGUSA, K
NAITO, O
NEYATANI, Y
OZEKI, T
TOBITA, K
ISHIDA, S
YOSHINO, R
KIKUCHI, M
MORI, M
NINOMIYA, H
[J]. NUCLEAR FUSION, 1994, 34 (12) : 1605 - 1618
[12] IMPROVED PLASMA PERFORMANCE IN TOKAMAKS WITH NEGATIVE MAGNETIC SHEAR
KESSEL, C
MANICKAM, J
REWOLDT, G
TANG, WM
[J]. PHYSICAL REVIEW LETTERS, 1994, 72 (08) : 1212 - 1215
[13] EQUILIBRIUM-ANALYSIS OF CURRENT PROFILES IN TOKAMAKS
LAO, LL
FERRON, JR
GROEBNER, RJ
HOWL, W
STJOHN, H
STRAIT, EJ
TAYLOR, TS
[J]. NUCLEAR FUSION, 1990, 30 (06) : 1035 - 1049
[14] HIGHER BETA AT HIGHER ELONGATION IN THE DIII-D TOKAMAK
LAZARUS, EA
CHU, MS
FERRON, JR
HELTON, FJ
HOGAN, JT
KELLMAN, AG
LAO, LL
LISTER, JB
OSBORNE, TH
SNIDER, R
STRAIT, EJ
TAYLOR, TS
TURNBULL, AD
[J]. PHYSICS OF FLUIDS B-PLASMA PHYSICS, 1991, 3 (08): : 2220 - 2229
[15] AN OPTIMIZATION OF BETA IN THE DIII-D TOKAMAK
LAZARUS, EA
LAO, LL
OSBORNE, TH
TAYLOR, TS
TURNBULL, AD
CHU, MS
KELLMAN, AG
STRAIT, EJ
FERRON, JR
GROEBNER, RJ
HEIDBRINK, WW
CARLSTROM, T
HELTON, FJ
HSIEH, CL
LIPPMANN, S
SCHISSEL, D
SNIDER, R
WROBLEWSKI, D
[J]. PHYSICS OF FLUIDS B-PLASMA PHYSICS, 1992, 4 (11): : 3644 - 3662
[16] LAZARUS EA, 1995, PLASMA PHYS CONTROLL, V1, P609
[17] THE MULTICHANNEL MOTIONAL STARK-EFFECT DIAGNOSTIC ON TFTR
LEVINTON, FM
[J]. REVIEW OF SCIENTIFIC INSTRUMENTS, 1992, 63 (10) : 5157 - 5160
[18] IMPROVED CONFINEMENT WITH REVERSED MAGNETIC SHEAR IN TFTR
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
[J]. PHYSICAL REVIEW LETTERS, 1995, 75 (24) : 4417 - 4420
[19] THE PROSPECTS FOR MAGNETOHYDRODYNAMIC STABILITY IN ADVANCED TOKAMAK REGIMES
MANICKAM, J
CHANCE, MS
JARDIN, SC
KESSEL, C
MONTICELLO, D
POMPHREY, N
REIMAN, A
WANG, C
ZAKHAROV, LE
[J]. PHYSICS OF PLASMAS, 1994, 1 (05) : 1601 - 1605
[20] PFEIFFER W, 1980, A16178 GEN AT

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