Study of internal transport barrier triggering mechanism in tokamak plasmas

被引：32

作者：

Dong, JQ

Mou, ZZ

Long, YX

Mahajan, SM

机构：

[1] SW Inst Phys, Chengdu, Peoples R China

[2] Univ Texas, Inst Fus Studies, Austin, TX 78712 USA

来源：

PHYSICS OF PLASMAS | 2004年 / 11卷 / 12期

关键词：

D O I：

10.1063/1.1808750

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：

Sheared flow layers driven by magnetic energy, released in tearing-reconnection processes inherent in dissipative magnetohydrodynamics, are proposed as a triggering mechanism for the creation of the internal transport barrier (ITB) in tokamak plasmas. The double tearing mode, mediated by anomalous electron viscosity in configurations with a nonmonotonic safety factor, is investigated as an example. Particular emphasis is placed on the formation of sheared poloidal flow layers in the vicinity of the magnetic islands. A quasilinear simulation demonstrates that the sheared flows induced by the mode have desirable characteristics (lying just outside the magnetic islands), and sufficient levels required for ITB formation. A possible explanation is also proffered for the experimental observation that the transport barriers are preferentially formed in the proximity of low-order rational surfaces. (C) 2004 American Institute of Physics.

引用

页码：5673 / 5679

页数：7

共 14 条

[1] Core transport reduction in tokamak plasmas with modified magnetic shear [J].

Bell, MG ;

Bell, RE ;

Efthimion, PC ;

Ernst, DR ;

Fredrickson, ED ;

Levinton, FM ;

Manickam, J ;

Mazzucato, E ;

Schmidt, GL ;

Synakowski, EJ ;

Zarnstorff, MC .

PLASMA PHYSICS AND CONTROLLED FUSION, 1999, 41 :A719-A731

[2] CONFINEMENT OF ANGULAR-MOMENTUM IN DIVERTOR AND LIMITER DISCHARGES IN THE DOUBLET-III TOKAMAK [J].

BURRELL, KH ;

GROEBNER, RJ ;

STJOHN, H ;

SERAYDARIAN, RP .

NUCLEAR FUSION, 1988, 28 (01) :3-15

[3] Double tearing mode in plasmas with anomalous electron viscosity [J].

Dong, JQ ;

Mahajan, SM ;

Horton, W .

PHYSICS OF PLASMAS, 2003, 10 (08) :3151-3159

[4]

GREENFIELD CM, 1998, PLASMA PHYS CONTROLL, V1, P13

[5] Electron heated internal transport harriers in JET [J].

Hogeweij, GMD ;

Baranov, Y ;

Conway, GD ;

Cortes, SR ;

De Baar, MR ;

Hawkes, N ;

Imbeaux, F ;

Litaudon, X ;

Mailloux, J ;

Rimini, FG ;

Sharapov, SE ;

Stratton, BC ;

Zastrow, KD .

PLASMA PHYSICS AND CONTROLLED FUSION, 2002, 44 (07) :1155-1165

[6] Internal transport barrier triggering by rational magnetic flux surfaces in tokamaks [J].

Joffrin, E ;

Challis, CD ;

Conway, GD ;

Garbet, X ;

Gude, A ;

Günter, S ;

Hawkes, NC ;

Hender, TC ;

Howell, DF ;

Huysmans, GTA ;

Lazzaro, E ;

Maget, P ;

Marachek, M ;

Peeters, AG ;

Pinches, SD ;

Sharapov, SE .

NUCLEAR FUSION, 2003, 43 (10) :1167-1174

[7] Triggering of internal transport barrier in JET [J].

Joffrin, E ;

Gorini, G ;

Challis, CD ;

Hawkes, NC ;

Hender, TC ;

Howell, DF ;

Maget, P ;

Mantica, P ;

Mazon, D ;

Sharapov, SE ;

Tresset, G .

PLASMA PHYSICS AND CONTROLLED FUSION, 2002, 44 (08) :1739-1752

[8] MHD internal transport barrier triggering in low positive magnetic shear scenarios in JET [J].

Joffrin, E ;

Challis, CD ;

Hender, TC ;

Howell, DF ;

Huysmans, GTA .

NUCLEAR FUSION, 2002, 42 (03) :235-242

[9] INTERNAL TRANSPORT BARRIER ON Q=3 SURFACE AND POLOIDAL PLASMA SPIN-UP IN JT-60U HIGH-BETA(P) DISCHARGES [J].

KOIDE, Y ;

KIKUCHI, M ;

MORI, M ;

TSUJI, S ;

ISHIDA, S ;

ASAKURA, N ;

KAMADA, Y ;

NISHITANI, T ;

KAWANO, Y ;

HATAE, T ;

FUJITA, T ;

FUKUDA, T ;

SAKASAI, A ;

KONDOH, T ;

YOSHINO, R ;

NEYATANI, Y .

PHYSICAL REVIEW LETTERS, 1994, 72 (23) :3662-3665

[10] A collisionless self-organizing model for the high-confinement (H-mode) boundary layer [J].

Mahajan, SM ;

Yoshida, Z .

PHYSICS OF PLASMAS, 2000, 7 (02) :635-640

← 1 2 →