Deposition Mitigation of the First Mirrors Exposed in EAST with Metal and Carbon Mixed Wall Materials

YAN Rong(鄢容); CHEN Junling(陈俊凌); CHEN Longwei(陈龙威); ZHU Dahuan(朱大焕)

doi:10.1088/1009-0630/16/9/14

Plasma Science and Technology > 2014 > 16(9): 885-889. > DOI: 10.1088/1009-0630/16/9/14

YAN Rong(鄢容), CHEN Junling(陈俊凌), CHEN Longwei(陈龙威), ZHU Dahuan(朱大焕). Deposition Mitigation of the First Mirrors Exposed in EAST with Metal and Carbon Mixed Wall Materials[J]. Plasma Science and Technology, 2014, 16(9): 885-889. DOI: 10.1088/1009-0630/16/9/14

Citation:

PDF (9672 KB)

Deposition Mitigation of the First Mirrors Exposed in EAST with Metal and Carbon Mixed Wall Materials

Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

Funds: supported by the National Magnetic Confinement Fusion Science Program of China (No. 2013GB105003) and National Natural Science Foundation of China (No. 11175205)

More Information

Received Date: July 03, 2013

Graphical Abstract

Abstract

Abstract

In order to investigate the effect of aperture geometry on deposition mitigation, stainless steel (SS) first mirrors (FMs) were fixed on the holders of protective aperture geometry with different depth-diameter ratios (DDRs) and exposed in the deposition dominated environment of EAST. A baffle was used during the wall conditioning. The surface properties and reflectivity of the FMs were characterized before and after exposure. It is shown that using aperture geometry and a baffle can effectively mitigate the impurities deposition. The degradation of the surface and specular reflectivity of the FMs is reduced with the increase of DDRs in the range of 0 to 2. The main contaminated elements in a low-Z and high-Z mixed wall materials environment were still carbon and oxygen.
- deposition mitigation,
- specular reflectivity,
- first mirror,
- EAST

FullText(HTML)

References (15)

References

1 Rubel M, Temmerman G De, Sundelin P, et al. 2009,Journal of Nuclear Materials, 390: 1066

2 Litnovsky A, Wienhold P, Philipps V, et al. 2007, Journal of Nuclear Materials, 1395: 363

3 Costley A E, Campbell D J, Kasai S, et al. 2001, Fusion Engineering and Design, 55: 331

4 Voitsenya V, Costley A E, Bandourko V, et al. 2001,Review of Scientific Instruments, 72: 475

5 Voitsenya V S, Bardamid A F, Belyaeva A F, et al.2008, Plasma Devices and Operations, 16: 1

6 Zhou Y, Gao B Y, Jiao Y M, et al. 2006, Fusion Engineering and Design, 81: 2823

7 Chen J, Yan R, Chen J L. 2012, Plasma Science and Technology, 14: 708

8 Temmerman G De, Pitts R A. 2008, Fusion Engineering and Design, 83: 30

9 Wienhold P, Litnovsky A, Philipps V, et al. 2005, Journal of Nuclear Materials, 337-339: 1116

10 Rudakov D L, Boedo J A, Moyer R A, et al. 2006,Review of Scientific Instruments, 10: 126

11 Xu G S, Li J G, Wan B N, et al. 2013, Association of Asia Pacific Physical Societies Bulletin, 23: 9

12 Yan R, Chen J L, Zhu D H, et al. 2012, Nuclear Fusion and Plasma Physics, 32: 240 (in Chinese)

13 Sun Z, Hu J S, Zuo G Z, et al. 2011, Lithium coating and its in°uence on plasma in EAST and HT-7.The 15th National conference on Plasma Science and Technology, Huangshan, Anhui, August 8-10

14 Akiyama T, Yoshida N, Kawahata K, et al. 2012, Nuclear Fusion, 52: 063014

15 Voitsenya V S, Litnovsky A. 2009, Plasma Devices and Operations, 17: 309

[1]	Huan LIU (刘欢), Liang WANG (王亮), Guosheng XU (徐国盛), Fang DING (丁芳), Jianbin LIU (刘建斌), Jichan XU (许吉禅), Wei FENG (冯威), Guozhong DENG (邓国忠), Xingwei ZHENG (郑星炜), Yaowei YU (余耀伟), Hang SI (司杭), Haiqing LIU (刘海庆), Qingquan YANG (杨清泉), Zhen SUN (孙震), Houyang GUO (郭后扬). Preliminary study of divertor particle exhaust in the EAST superconducting tokamak[J]. Plasma Science and Technology, 2017, 19(9): 95101-095101. DOI: 10.1088/2058-6272/aa6f5a
[2]	Baoguo WANG (王保国), Dahuan ZHU (朱大焕), Rui DING (丁锐), Junling CHEN (陈俊凌). Thermal analysis on the EAST tungsten plasma facing components with shaping structure counteracting the misalignment issues[J]. Plasma Science and Technology, 2017, 19(2): 25603-025603. DOI: 10.1088/2058-6272/19/2/025603
[3]	Guozhong DENG (邓国忠), Liang WANG (王亮), Xiaoju LIU (刘晓菊), Yanmin DUAN (段艳敏), Jiansheng HU (胡建生), Changzheng LI (李长征), Ling ZHANG (张凌), Shaocheng LIU (刘少承), Huiqian WANG (汪惠乾), Liang CHEN (陈良), Jichan XU (许吉禅), Wei FENG (冯威), Jianbin LIU (刘建斌), Huan LIU (刘欢), Guosheng XU (徐国盛), Houyang GUO (郭后扬), Xiang GAO (高翔), the EAST team. Achieving temporary divertor plasma detachment with MARFE events by pellet injection in the EAST superconducting tokamak[J]. Plasma Science and Technology, 2017, 19(1): 15101-015101. DOI: 10.1088/1009-0630/19/1/015101
[4]	LIU Xiaolong (刘晓龙), Kazuo NAKAMURA, Tatsuya YOSHISUE, Osamu MITARAI, Makoto HASEGAWA, Kazutoshi TOKUNAGA, XUE Erbing (薛二兵), Hideki ZUSHI, Kazuaki HANADA, Akihide FUJISAWA, Hiroshi IDEI, et al.. H_∞ Loop Shaping Control for Plasma Vertical Position Instability on QUEST[J]. Plasma Science and Technology, 2013, 15(3): 295-299. DOI: 10.1088/1009-0630/15/3/21
[5]	WANG Zhongtian (王中天), WANG Long (王龙), LONG Yongxing (龙永兴), DONG Jiaqi (董家齐), HE Zhixiong (何志雄), LIU Yu (刘宇), TANG Changjian (唐昌建). Shaping Effects of the E-Fishbone in Tokamaks[J]. Plasma Science and Technology, 2013, 15(1): 12-16. DOI: 10.1088/1009-0630/15/1/03
[6]	ZHU Zhe (朱哲), ZHU Yinfeng (朱银锋), HUANG Ronglin (黄荣林), FU Peng (傅鹏), DING Yixiao(丁逸骁). Study on the Current-sharing Control System of the TF Power Supply for a Superconducting Tokamak[J]. Plasma Science and Technology, 2012, 14(10): 941-946. DOI: 10.1088/1009-0630/14/10/16
[7]	WANG Liang, XU Guosheng, CHANG Jiafeng, ZHANG Wei, YAN Ning, DING Siye..... Study of Scrape-Off-Layer Width in Ohmic and Lower Hybrid Wave Heated Double-Null Divertor Plasma in EAST[J]. Plasma Science and Technology, 2011, 13(4): 435-439.
[8]	K. HANADA, H. ZUSHI, H. IDEI, K. NAKAMURA, M. ISHIGURO, S. TASHIMA, E. I. KALINNIKOVA, M. SAKAMOTO, M. HASEGAWA, A. FUJISAWA, A. HIGASHIJIMA, S. KAWASAKI, H. NAKASHIMA, H. LIU, O. MITARAI, T. MAEKAWA. Non-inductive start up of QUEST plasma by RF power[J]. Plasma Science and Technology, 2011, 13(3): 307-311.
[9]	GAO Zhe. Analytical Theory of the Geodesic Acoustic Mode in the Small and Large Orbit Drift Width Limits and its Application in a Study of Plasma Shaping Effect[J]. Plasma Science and Technology, 2011, 13(1): 15-20.
[10]	NI Qionglin, FAN Tieshuan, ZHANG Xing, ZHANG Cheng, REN Qilong, HU Chundong. Predictive Calculation of Neutral Beam Heating Plasmas in EAST Tokamak by NUBEAM Code for Certain Parameter Ranges[J]. Plasma Science and Technology, 2010, 12(6): 661-667.