Transport reduction by rotation shear in tokamak-edge turbulence

被引：38

作者：

Figarella, CF

Benkadda, S

Beyer, P

Garbet, X

Voitsekhovitch, I

机构：

[1] Univ Aix Marseille 1, Ctr St Jerome, CNRS, UMR 6633,LPIIM,Equipe Dynam Syst Complexex, F-13397 Marseille 20, France

[2] CEN Cadarache, Assoc EURATOM CEA Fus, F-13108 St Paul Les Durance, France

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.90.015002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Effects of externally imposed and self-generated poloidal flows on turbulent transport in the edge region of a tokamak are investigated using 3D nonlinear global simulations of resistive pressure-gradient-driven turbulence. Transport reduction is found to be due to synergetic changes in the fluctuation amplitude and in the dephasing of the fluctuations. A scaling of the fluctuation level and turbulent diffusivity with ExB flow shear strength is deduced from these simulations. These scalings agree with recent experimental observations on edge biasing as well as with analytical models.

引用

页数：4

共 31 条

[1] Electrostatic transport reduction induced by flow shear modification in a reversed field pinch plasma [J].

Antoni, V ;

Martines, E ;

Desideri, D ;

Fattorini, L ;

Serianni, G ;

Spolaore, M ;

Tramontin, L ;

Vianello, N .

PLASMA PHYSICS AND CONTROLLED FUSION, 2000, 42 (02) :83-90

[2] Bursty transport in tokamak turbulence: Role of zonal flows and internal transport barriers [J].

Benkadda, S ;

Beyer, P ;

Bian, N ;

Figarella, C ;

Garcia, O ;

Garbet, X ;

Ghendrih, P ;

Sarazin, Y ;

Diamond, PH .

NUCLEAR FUSION, 2001, 41 (08) :995-1001

[3] Center manifold theory for the dynamics of the L-H-transition [J].

Beyer, P ;

Spatschek, KH .

PHYSICS OF PLASMAS, 1996, 3 (03) :995-1004

[4] Tokamak turbulence with stochastic field lines [J].

Beyer, P ;

Garbet, X ;

Ghendrih, P .

PHYSICS OF PLASMAS, 1998, 5 (12) :4271-4279

[5] 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

[6] Enhanced particle confinement and turbulence reduction due to E x B shear in the TEXTOR tokamak [J].

Boedo, J ;

Gray, D ;

Jachmich, S ;

Conn, R ;

Terry, GP ;

Tynan, G ;

Van Oost, G ;

Weynants, RR .

NUCLEAR FUSION, 2000, 40 (07) :1397-1410

[7] Scaling of plasma turbulence suppression with velocity shear [J].

Boedo, JA ;

Gray, DS ;

Terry, PW ;

Jachmich, S ;

Tynan, GR ;

Conn, RW .

NUCLEAR FUSION, 2002, 42 (02) :117-121

[8] Suppression of temperature fluctuations and energy barrier generation by velocity shear [J].

Boedo, JA ;

Terry, PW ;

Gray, D ;

Ivanov, RS ;

Conn, RW ;

Jachmich, S ;

Van Oost, G .

PHYSICAL REVIEW LETTERS, 2000, 84 (12) :2630-2633

[9] RESISTIVE PRESSURE-GRADIENT-DRIVEN TURBULENCE WITH SELF-CONSISTENT FLOW PROFILE EVOLUTION [J].

CARRERAS, BA ;

LYNCH, VE ;

GARCIA, L ;

DIAMOND, PH .

PHYSICS OF FLUIDS B-PLASMA PHYSICS, 1993, 5 (05) :1491-1505

[10] DYNAMICS OF 2ND-ORDER PHASE-TRANSITIONS IN RESISTIVE PRESSURE-GRADIENT-DRIVEN TURBULENCE [J].

CARRERAS, BA ;

LYNCH, VE ;

GARCIA, L ;

DIAMOND, PH .

PHYSICS OF PLASMAS, 1995, 2 (07) :2744-2752

← 1 2 3 4 →