Characterization of dust collected in EAST after 2019 campaign

Kun ZHANG (章坤); Rui DING (丁锐); Jiao PENG (彭姣); Rong YAN (鄢容); Junling CHEN (陈俊凌); Dahuan ZHU (朱大焕); Changjun LI (李长君); Xiongyuan SI (司雄元)

doi:10.1088/2058-6272/ac0491

Plasma Science and Technology > 2021 > 23(7): 75104-075104. > DOI: 10.1088/2058-6272/ac0491

Kun ZHANG (章坤), Rui DING (丁锐), Jiao PENG (彭姣), Rong YAN (鄢容), Junling CHEN (陈俊凌), Dahuan ZHU (朱大焕), Changjun LI (李长君), Xiongyuan SI (司雄元). Characterization of dust collected in EAST after 2019 campaign[J]. Plasma Science and Technology, 2021, 23(7): 75104-075104. DOI: 10.1088/2058-6272/ac0491

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Characterization of dust collected in EAST after 2019 campaign

¹ Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, People's Republic of China
² University of Science and Technology of China, Hefei 230026, People's Republic of China
³ Biotechnology Center, Anhui Agricultural University, Hefei 230026, People's Republic of China

Funds: This work was supported by National Natural Science Foundation of China (Nos. 12022511, 11861131010 and 12075279), the National Key Research and Development Program of China (Nos. 2017YFE0301300 and 2017YFA0402500), the CASHIPS Director's Fund (No. BJPY2019B01) and the Key Research Program of Frontier Sciences of CAS (No. ZDBS-LY-SLH010).

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Received Date: March 31, 2021
Revised Date: May 19, 2021
Accepted Date: May 23, 2021

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Abstract

Dust presented in experimental advanced superconducting tokamak (EAST) with mixed plasma-facing materials has been collected and characterized for the first time. Dust at different positions in the vessel was collected by vacuum cleaner after the first experimental campaign in 2019. The shape, composition, and size of dust particles have been analyzed using different methods. About 80% of the total number of dust particles have size between 20 and 80 μm, and most of dust particles are spherical, while schistose shape, columnar and irregular shape were also found. With the help of energy-dispersive x-ray spectroscopy different elements of dust have been identified, which is generally consistent with the different plasma-facing components in EAST. Both x-ray fluorescence and inductively coupled plasma emission spectrometer are complementary methods for measuring the dust composition quantitatively. It was found that the major components of dust were lithium dust in the form of lithium carbonate and lithium hydroxide, which is due to the routine lithium wall conditioning during EAST operation.
- tokamak,
- dust,
- morphology,
- composition analysis

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Characterization of dust collected in EAST after 2019 campaign

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