Complete stabilization of a tearing mode in steady state high-βp H-mode discharges by the first harmonic electron cyclotron heating/current drive on JT-60U

被引：156

作者：

Isayama, A ^{[1
]}

Kamada, Y ^{[1
]}

Ide, S ^{[1
]}

Hamamatsu, K ^{[1
]}

Oikawa, T ^{[1
]}

Suzuki, T ^{[1
]}

Neyatani, Y ^{[1
]}

Ozeki, T ^{[1
]}

Ikeda, Y ^{[1
]}

Kajiwara, K ^{[1
]}

机构：

[1] Japan Atom Energy Res Inst, Naka Fus Res Estab, Naka, Ibaraki 3110193, Japan

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2000年 / 42卷 / 12期

关键词：

D O I：

10.1088/0741-3335/42/12/102

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：

A tearing mode with m = 3 and n = 2, destabilized in the steady state high-Bp H-mode discharges with edge localized mode (ELM), was completely stabilized by local heating and current drive using the 110 GHz first harmonic O-mode electron cyclotron CEC) wave. Here, m and n are poloidal and toroidal mode numbers, respectively. The optimum EC wave injection angle was determined by identifying the mode location from an electron temperature perturbation profile and a safety factor profile. The optimum injection angle was also determined by scanning a steerable mirror during a discharge. In a typical discharge where the tearing mode is completely stabilized, the ratio of the electron cyclotron heating power to the total heating power is 0.17, and the ratio of the EC driven current to the total plasma current is 0.02. Stored energy and neutron emission rate were higher for the case with EC wave injection than that without EC wave injection, which suggests that the reduction of the stored energy and the neutron emission rate was recovered by the tearing mode stabilization.

引用

页码：L37 / L45

页数：9

共 19 条

[1] OBSERVATION OF NONLINEAR NEOCLASSICAL PRESSURE-GRADIENT-DRIVEN TEARING MODES IN TFTR [J].

CHANG, Z ;

CALLEN, JD ;

FREDRICKSON, ED ;

BUDNY, RV ;

HEGNA, CC ;

MCGUIRE, KM ;

ZARNSTORFF, MC .

PHYSICAL REVIEW LETTERS, 1995, 74 (23) :4663-4666

[2] Complete suppression of neoclassical tearing modes with current drive at the electron-cyclotron-resonance frequency in ASDEX upgrade tokamak [J].

Gantenbein, G ;

Zohm, H ;

Giruzzi, G ;

Günter, S ;

Leuterer, F ;

Maraschek, M ;

Meskat, J ;

Yu, Q .

PHYSICAL REVIEW LETTERS, 2000, 85 (06) :1242-1245

[3] Neoclassical islands on COMPASS-D [J].

Gates, DA ;

Lloyd, B ;

Morris, AW ;

McArdle, G ;

O'Brien, MR ;

Valovic, M ;

Warrick, CD ;

Wilson, HR .

NUCLEAR FUSION, 1997, 37 (11) :1593-1606

[4]

HAMAMATSU K, 2000, IN PRESS FUSION ENG

[5]

Huysmans GTA, 1999, NUCL FUSION, V39, P1965

[6]

IKEDA Y, 2000, IN PRESS FUSION ENG

[7] Measurement of magnetic island width in long-pulse, high-βN discharges in JT-60U [J].

Isayama, A ;

Kamada, Y ;

Ozeki, T ;

Isei, N .

PLASMA PHYSICS AND CONTROLLED FUSION, 1999, 41 (01) :35-43

[8]

ISAYAMA A, 2000, IN PRESS J PLASMA RE

[9] Long sustainment of JT-60U plasmas with high integrated performance [J].

Kamada, Y ;

Isayama, A ;

Oikawa, T ;

Sakamoto, Y ;

Hosogane, N ;

Takenaga, H ;

Kusama, Y ;

Fujita, T ;

Takeji, S ;

Ozeki, T ;

Ishii, Y ;

Tokuda, S ;

Ushigusa, K ;

Naito, O ;

Ishida, S ;

Koide, Y ;

Fukuda, T ;

Takizuka, T ;

Shirai, H ;

Hatae, T .

NUCLEAR FUSION, 1999, 39 (11Y) :1845-1853

[10]

KAMADA Y, 1997, FUSION ENERGY 1996, V1, P247

← 1 2 →