摘要
Dust presented in experimental advanced superconducting tokamak(EAST)with mixed plasmafacing 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 80μm,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.
作者
章坤
丁锐
彭姣
鄢容
陈俊凌
朱大焕
李长君
司雄元
Kun ZHANG;Rui DING;Jiao PENG;Rong YAN;Junling CHEN;Dahuan ZHU;Changjun LI;Xiongyuan SI(Institute of Plasma Physics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,People’s Republic of China;University of Science and Technology of China,Hefei 230026,People’s Republic of China;Biotechnology Center,Anhui Agricultural University,Hefei 230026,People’s Republic of China)
基金
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)
the Key Research Program of Frontier Sciences of CAS(No.ZDBS-LY-SLH010).
