High bootstrap current in RF-heated discharges

被引：8

作者：

Becoulet, A ^{[1
]}

Basiuk, V ^{[1
]}

Joffrin, E ^{[1
]}

Hoang, GT ^{[1
]}

机构：

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

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 1998年 / 40卷

关键词：

D O I：

10.1088/0741-3335/40/8A/012

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：

Purely non-inductive steady-state discharges in tokamak reactors will require a large bootstrap current, I-boot, in order to minimize the amounts of power in external current drive systems. in present day tokamaks, high bootstrap current discharges are produced under various conditions. It has been demonstrated that the on-axis RF heatings are good candidates for producing a large bootstrap current, especially the fast magnetosonic wave direct electron heating (FWEH), for which power deposition is centrally peaked. Moreover, the heating and current drive methods using RF waves could be used as external sources to optimize I-boot through the current profile control. In this paper, the dependence of I-boot on the profiles of the plasma density, temperature, pressure and current density is analysed using a theoretical approach with a matrix formulation. Examples of quasi-steady-state discharges with large bootstrap current fraction using FWEH on Tore Supra are given. Examples of high bootstrap current fractions on reverse shear discharges (TFTR, DIII-D,...) are also mentioned. Purely non-inductive discharges with improved confinement by combination of FWEH and lower hybrid current drive are analysed and the extrapolation to the so-called 'Tore Supra CIEL phase' is reported.

引用

页码：A157 / A170

页数：14

共 27 条

[21]

NAVE P, 1997, P 24 EPS C BERSC A 1, V21, P1

[22]

NGUYEN F, 1995, P 22 EUR C CONTR C 2, V19, P353

[23]

POMPHREY N, 1992, PPPL2854 PRINC PLASM

[24] EFFECTS INDUCED BY ICRF WAVES ON VARIOUS CONFINEMENT SCHEMES IN TORE-SUPRA [J].

SAOUTIC, B .

PLASMA PHYSICS AND CONTROLLED FUSION, 1994, 36 (12B) :B123-B132

[25]

Schmidt G. L., 1988, PLASMA PHYS CONTR F, V1, P215

[26] Stability of negative central magnetic shear discharges in the DIII-D tokamak [J].

Strait, EJ ;

Casper, TA ;

Chu, MS ;

Ferron, JR ;

Garofalo, A ;

Greenfield, CM ;

LaHaye, RJ ;

Lao, LL ;

Lazarus, EA ;

Miller, RL ;

Navratil, GA ;

Ren, C ;

Rice, BW ;

Semenov, I ;

Sips, ACC ;

Soldner, FX ;

Stallard, BW ;

Taylor, TS ;

Turnbull, AD .

PHYSICS OF PLASMAS, 1997, 4 (05) :1783-1791

[27] BOOTSTRAP CURRENT IN TFTR [J].

ZARNSTORFF, MC ;

BELL, MG ;

BITTER, M ;

GOLDSTON, RJ ;

GREK, B ;

HAWRYLUK, RJ ;

HILL, K ;

JOHNSON, D ;

MCCUNE, D ;

PARK, H ;

RAMSEY, A ;

TAYLOR, G ;

WIELAND, R .

PHYSICAL REVIEW LETTERS, 1988, 60 (13) :1306-1309

← 1 2 3 →