Electron cyclotron heating assisted startup in JT-60U

被引：72

作者：

Kajiwara, K ^{[1
]}

Ikeda, Y

Seki, M

Moriyama, S

Oikawa, T

Fujii, T

机构：

[1] Oak Ridge Inst Sci & Educ, Oak Ridge, TN USA

[2] Japan Atom Energy Res Inst, Naka, Ibaraki 31101, Japan

[3] Gen Atom Co, San Diego, CA USA

来源：

NUCLEAR FUSION | 2005年 / 45卷 / 07期

关键词：

D O I：

10.1088/0029-5515/45/7/019

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：

Electron cyclotron heating (ECH)-assisted startup experiments have been performed in JT-60U. The breakdown loop voltage was successfully reduced from 25 to 4 V (= 0.26 V m(-1)) by 200 kW ECH. This is lower than the 0.3 V m(-1), which corresponds to the maximum electric field in ITER. Parameter scans of ECH power, prefill pressure, resonance position and polarization were carried out. The sensitivity of the breakdown to polarization and resonance position was observed. A prefilling gas pressure scan showed that the initial breakdown density increases with prefill pressure when it is is lower than 8 x 10(-5) Torr. Higher harmonic ECH was also attempted. The second harmonic ECH-assisted startup was possible with higher ECH power injection. However, the third harmonic ECH-assisted startup was not successful.

引用

页码：694 / 705

页数：12

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