Deuterium Retention in SiC-Coated Graphite Tiles of EAST

ZHAO Liping(赵利平); WANG Wanjing(王万景); ZHOU Haishan(周海山); WU Jing(吴婧); XIE Chunyi(谢春意); LI Qiang(李强); YANG Zhongshi(杨钟时); LUO Guangnan(罗广南)

doi:10.1088/1009-0630/16/3/04

Plasma Science and Technology > 2014 > 16(3): 193-196. > DOI: 10.1088/1009-0630/16/3/04

ZHAO Liping(赵利平), WANG Wanjing(王万景), ZHOU Haishan(周海山), WU Jing(吴婧), XIE Chunyi(谢春意), LI Qiang(李强), YANG Zhongshi(杨钟时), LUO Guangnan(罗广南). Deuterium Retention in SiC-Coated Graphite Tiles of EAST[J]. Plasma Science and Technology, 2014, 16(3): 193-196. DOI: 10.1088/1009-0630/16/3/04

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Deuterium Retention in SiC-Coated Graphite Tiles of EAST

1 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China 2 Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621000, China

Funds: supported partially by National Natural Science Foundation of China (Nos.10905070, 10875148 and 10728510), the Knowledge Innovation Program of the Chinese Academy of Sciences, the National Magnetic Confinement Fusion Science Program of China (No.2009GB106005)

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Received Date: April 10, 2012

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Abstract

Fuel retention and recycling in plasma facing materials is a crucial issue for fusion devices, especially for the long pulse discharge devices. In this work, the deuterium retention and the surface erosion of SiC-coated graphite tiles exposed to EAST plasmas have been studied by post-mortem analyses, i.e., thermal desorption spectroscopy (TDS), secondary ion mass spec- troscopy (SIMS) and scanning electron microscopy (SEM). The results show that the sample cut from the high field side (HF) tile has been intensely eroded due to deuterium bombardment on plasma facing surfaces in the initial phase of discharges and trapped highest amount of deuterium. Lower deuterium retention has been found in the inner divertor sample, which is presumably due to the particular exposure history in the 2010 spring campaign.
- deuterium retention,
- post-mortem analyses,
- SiC-coated graphite tiles,
- EAST

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References

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Deuterium Retention in SiC-Coated Graphite Tiles of EAST