Cleaning of HT-7 Tokamak Exposed First Mirrors by Radio Frequency Magnetron Sputtering Plasma

被引：15

作者：

Yan Rong ^{[1
]}

Chen Junling ^{[1
]}

Chen Longwei ^{[1
]}

Ding Rui ^{[1
]}

Zhu Dahuan ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China

来源：

PLASMA SCIENCE & TECHNOLOGY | 2014年 / 16卷 / 12期

基金：

中国国家自然科学基金;

关键词：

radio frequency; plasma sputtering; first mirror; cleaning; DIAGNOSTIC MIRRORS; HL-2A; ITER;

D O I：

10.1088/1009-0630/16/12/13

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 stainless steel (SS) first mirror pre-exposed in the deposition-dominated environment of the HT-7 tokamak was cleaned in the newly built radio frequency (RF) magnetron sputtering plasma device. The deposition layer on the FM surface formed during the exposure was successfully removed by argon plasma with a RF power of about 80 W and a gas pressure of 0.087 Pa for 30 min. The total reflectivity of the mirrors was recovered up to 90% in the wavelength range of 300-800 nm, while the diffuse reflectivity showed a little increase, which was attributed to the increase of surface roughness in sputtering, and residual contaminants. The FMs made from single crystal materials could help to achieve a desired recovery of specular reflectivity in the future.

引用

页码：1158 / 1162

页数：5

共 15 条

[1] Influence of Erosion and Deposition on Metallic First Mirror in HT-7 Tokamak
Chen Ju
Yan Rong
Chen Junling
[J]. PLASMA SCIENCE & TECHNOLOGY, 2012, 14 (08) : 708 - 711
[2] Characterization and removal of co-deposition on the first mirror of HL-2A by excimer laser cleaning
Hai, Ran
Xiao, Qingmei
Zhang, Lei
Ding, Hongbin
Zhou, Yan
Yan, Longwen
[J]. JOURNAL OF NUCLEAR MATERIALS, 2013, 436 (1-3) : 118 - 122
[3] Assessment of cleaning methods for first mirrors tested in JET for ITER
Ivanova, D.
Widdowson, A.
Likonen, J.
Marot, L.
Koivuranta, S.
Coad, J. P.
Rubel, M.
Petersson, P.
De Temmerman, G.
[J]. JOURNAL OF NUCLEAR MATERIALS, 2013, 438 : S1241 - S1244
[4] Analyses of metallic first mirror samples after long term plasma exposure in Tore Supra
Lipa, M
Schunke, B
Gil, C
Bucalossi, J
Voitsenya, VS
Konovalov, V
Vukolov, K
Balden, M
De Temmerman, G
Oelhafen, P
Litnovsky, A
Wienhold, P
[J]. FUSION ENGINEERING AND DESIGN, 2006, 81 (1-7) : 221 - 225
[5] First tests of diagnostic mirrors in a tokamak divertor: An overview of experiments in D111-D
Litnovsky, A.
Rudakov, D. L.
De Temmerman, G.
Wienhold, P.
Philipps, V.
Samm, U.
McLean, A. G.
West, W. P.
Wong, C. P. C.
Brooks, N. H.
Watkins, J. G.
Wampler, W. R.
Stangeby, P. C.
Boedo, J. A.
Moyer, R. A.
Allen, S. L.
Fenstermacher, M. E.
Groth, M.
Lasnier, C. J.
Boivin, R. L.
Leonard, A. W.
Romanyuk, A.
Hirai, T.
Pintsuk, G.
Breuer, U.
Scholl, A.
[J]. FUSION ENGINEERING AND DESIGN, 2008, 83 (01) : 79 - 89
[6] First studies of ITER-diagnostic mirrors in a tokamak with an all-metal interior: results of the first mirror test in ASDEX Upgrade
Litnovsky, A.
Matveeva, M.
Herrmann, A.
Rohde, V.
Mayer, M.
Sugiyama, K.
Krieger, K.
Voitsenya, V.
Vayakis, G.
Costley, A. E.
Reichle, R.
De Temmerman, G.
Richter, S.
Breuer, U.
Buzi, L.
Moeller, S.
Philipps, V.
Samm, U.
Wienhold, P.
[J]. NUCLEAR FUSION, 2013, 53 (07)
[7] Development of in situ cleaning techniques for diagnostic mirrors in ITER
Litnovsky, A.
Laengner, M.
Matveeva, M.
Schulz, Ch.
Marot, L.
Voitsenya, V. S.
Philipps, V.
Biel, W.
Samm, U.
[J]. FUSION ENGINEERING AND DESIGN, 2011, 86 (9-11) : 1780 - 1783
[8] Litnovsky A., 2013, MIRR CLEAN WORKSH CA
[9] An overview of a comprehensive First Mirror Test for ITER at JET
Rubel, M.
De Temmerman, G.
Sundelin, P.
Coad, J. P.
Widdowson, A.
Hole, D.
Le Guern, F.
Stamp, M.
Vince, J.
[J]. JOURNAL OF NUCLEAR MATERIALS, 2009, 390-91 : 1066 - 1069
[10] Tang CJ, 2008, PLASMA SCI TECHNOL, V10, P412, DOI 10.1088/1009-0630/10/4/03

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