Zigong Xu¹, Robert F Wimmer-Schweingruber², Jingnan Guo^3,4, Jia Yu³, Shenyi Zhang⁵, Thomas Berger⁶, Daniel Matthiae⁷, Soenke Burmeister⁸, Stephan I Boettcher² and Bernd Heber³, (1)University of Kiel, Institute of Experimental and Applied Physics, Kiel, Germany, (2)University of Kiel, Institute for Experimental and Applied Physics, Kiel, Germany, (3)University of Kiel, Kiel, Germany, (4)USTC University of Science and Technology of China, Hefei, China, (5)NSSC National Space Science Center, CAS, Beijing, China, (6)German Aerospace Center DLR Cologne, Institute for Flight Medicine, Cologne, Germany, (7)DLR, Cologne, Germany, (8)Christian-Albrechts-Universität zu Kiel, Institute for Experimental and Applied Physics, Kiel, Germany