ION-CYCLOTRON RANGE OF FREQUENCIES STABILIZATION OF SAWTEETH ON TOKAMAK FUSION TEST REACTOR

被引:40
作者
PHILLIPS, CK
HOSEA, J
MARMAR, E
PHILLIPS, MW
SNIPES, J
STEVENS, J
TERRY, J
WILSON, JR
BELL, M
BITTER, M
BOIVIN, R
BUSH, C
CHENG, CZ
DARROW, D
FREDRICKSON, E
GOLDFINGER, R
HAMMETT, GW
HILL, K
HOFFMAN, D
HOULBERG, W
HSUAN, H
HUGHES, M
JASSBY, D
MCCUNE, D
MCGUIRE, K
NAGAYAMA, Y
OWENS, DK
PARK, H
RAMSEY, A
SCHILLING, G
SCHIVELL, J
SMITHE, DN
STRATTON, B
SYNAKOWSKI, E
TAYLOR, G
TOWNER, H
WHITE, R
ZWEBEN, S
机构
[1] MIT,CAMBRIDGE,MA 02139
[2] GRUMMAN CORP,PRINCETON,NJ 08540
[3] OAK RIDGE NATL LAB,OAK RIDGE,TN 37831
[4] UNIV TOKYO,TOKYO 113,JAPAN
[5] MISSION RES CORP,NEWINGTON,VA 22122
来源
PHYSICS OF FLUIDS B-PLASMA PHYSICS | 1992年 / 4卷 / 07期
关键词
D O I
10.1063/1.860484
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
Results obtained from experiments utilizing high-power ion cyclotron range of frequencies (ICRF) heating to stabilize sawtooth oscillations on Tokamak Fusion Test Reactor (TFTR) [Hawryluk et al., Plasma Phys. Controlled Fusion 33, 1509 (1991)] are reviewed. The key observations include existence of a minimum ICRF power required to achieve stabilization, a dependence of the stabilization threshold on the relative size of the ICRF power deposition profile to the q = 1 volume, and a peaking of the equilibrium pressure and current profiles during sawtooth-free phases of the discharges. In addition, preliminary measurements of the poloidal magnetic field profile indicate that q on axis decreases to a value of 0.55 +/- 0.15 after a sawtooth-stabilized period of approximately 0.5 sec has transpired. The results are discussed in the context of theory, which suggests that the fast ions produced by the ICRF heating suppress sawteeth by stabilizing the m = 1 magnetohydrodynamic (MHD) instabilities believed to be the trigger for the sawtooth oscillations. Though qualitative agreement is found between the observations and the theory, further refinement of the theory coupled with more accurate measurements of experimental profiles will be required in order to complete quantitative comparisons.
引用
收藏
页码:2155 / 2164
页数:10
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