Siliconization for wall conditioning and its effect on plasma performance in HL-2A tokamak

被引：15

作者：

Duan, X. R. ^{[1
]}

Cao, Z. ^{[1
]}

Cui, C. H. ^{[1
]}

Cai, X. ^{[1
]}

Sun, H. J. ^{[1
]}

Ding, X. T. ^{[1
]}

Pan, Y. D. ^{[1
]}

Wang, M. X. ^{[1
]}

Yang, Q. W. ^{[1
]}

Song, X. M. ^{[1
]}

Liu, D. Q. ^{[1
]}

Liu, Y. ^{[1
]}

Ji, X. Q. ^{[1
]}

Cui, Z. Y. ^{[1
]}

Zhou, Y. ^{[1
]}

Liu, Yong ^{[1
]}

机构：

[1] Southwestern Inst Phys, Chengdu 610041, Peoples R China

来源：

JOURNAL OF NUCLEAR MATERIALS | 2007年 / 363卷 / 1-3期

关键词：

plasma facing material; siliconization; wall recycling; density control;

D O I：

10.1016/j.jnucmat.2007.01.185

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Wall conditioning with siliconization has been performed in the HL-2A tokamak to improve the plasma performance. It was based on the plasma chemical vapor deposition by using a four-anode glow discharge cleaning system and gas mixture of 90% He+ 10% SiH4. It was found that the main components of the residual gas were CO, H-2 and H2O. The amount of H2O was reduced from 49.5% to 24.5%. After siliconization, the impurity fluxes released from the first wall were reduced, especially the oxygen level (till to 10%) and high z impurities like Cu were decreased significantly. The total radiated power measured by the bolometer was decreased from 70% to 35%. A high density exceeding the Greenwald limit and energy confinement improvement have been achieved. The plasma operational region of HL-2A has been effectively broadened. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：1340 / 1345

页数：6

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