High density operation on the HT-7 superconducting tokamak

被引：36

作者：

Gao, X ^{[1
]}

Jie, YX ^{[1
]}

Xia, CY ^{[1
]}

Wei, MS ^{[1
]}

Yang, Y ^{[1
]}

Zhang, SY ^{[1
]}

Zhao, JY ^{[1
]}

Hu, LQ ^{[1
]}

Zhu, YB ^{[1
]}

Luo, JR ^{[1
]}

Zhao, YP ^{[1
]}

Qiu, N ^{[1
]}

Li, JG ^{[1
]}

Wan, BN ^{[1
]}

Kuang, GL ^{[1
]}

Zhang, XD ^{[1
]}

Liu, XN ^{[1
]}

Gong, XZ ^{[1
]}

Bao, Y ^{[1
]}

Lin, BL ^{[1
]}

Wu, ZW ^{[1
]}

Li, YD ^{[1
]}

Shi, YJ ^{[1
]}

Song, M ^{[1
]}

Fu, P ^{[1
]}

Zhang, XM ^{[1
]}

Zeng, M ^{[1
]}

Xie, AG ^{[1
]}

Cui, NZ ^{[1
]}

Ruan, HL ^{[1
]}

Wang, L ^{[1
]}

Sheng, B ^{[1
]}

Liu, S ^{[1
]}

Ye, WW ^{[1
]}

Yang, K ^{[1
]}

Liu, JK ^{[1
]}

Cheng, YF ^{[1
]}

Fan, HY ^{[1
]}

Liu, SX ^{[1
]}

Tong, XD ^{[1
]}

Mao, JS ^{[1
]}

Gu, XM ^{[1
]}

Xie, JK ^{[1
]}

Wan, YX ^{[1
]}

机构：

[1] Acad Sinica, Inst Plasma Phys, Hefei, Anhui, Peoples R China

来源：

NUCLEAR FUSION | 2000年 / 40卷 / 11期

关键词：

D O I：

10.1088/0029-5515/40/11/307

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：

The structure of the operation region has been studied in the HT-7 superconducting tokamak, and progress on the extension of the HT-7 ohmic discharge operation region is reported. A density corresponding to 1.2 times the Greenwald limit was achieved by RF boronization. The density limit appears to be connected to the impurity contest and the edge parameters, so the best results are obtained with very clean plasmas and peaked electron density profiles. The peaking factors of electron density profiles for different current and line averaged densities were observed. The density behaviour and the fuelling efficiency for gas puffing (20-30%), pellet injection (70-80%) and molecular beam injection (40-50%) were studied. The core crash sawteeth and MHD behaviour, which were induced by an injected pellet, were observed and the events correlated with the change of current profile and reversed magnetic shear. The MARFE phenomena on HT-7 are summarized. The best correlation has been found between the total input ohmic power and the product of the edge line averaged density and Z(eff) HT-7 could be easily operated in the high density region MARFE-free using RF boronization.

引用

页码：1875 / 1883

页数：9

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