supported by the Strategic Priority Program on Space Science,the Chinese Academy of Sciences,Grant No.XDA15020500,XDA15020501,XDA15020501-02.
Background The Gas Pixel Detector(GPD)is a key part of the Polarimetry Focusing Array(PFA)sub-system onboard the enhance X-ray Timing and Polarimetry mission(eXTP).The GPD can accurately provide the polarized angle an...
the Strategic Priority Research Program of the Chinese Academy of Sciences,Grant No.XDA10011100.
Background The linearity and photon detection efficiency(PDE)are important parameters of photomultiplier tube(PMT),which need to be precisely measured with suitable techniques.Purpose To search good methods for linear...
This research was supported by National Natural Science Foundation of China,Grant No.11327303,11473028 and 11675196;International Science and Technology Cooperation Program of China,Grant No.2015DFA10140;Interdisciplinary Innovation Team Project of Chinese Academy of Sciences(Research Team of The High Energy cosmic-Radiation Detection);Qianren start-up,Grant No.292012312D1117210;Strategic Pioneer Program in Space Science,Chinese Academy of Sciences,Grant No.XDA04075600;Youth Innovation Promotion Association of CAS,Grant No.2014009.The authors would like to thank Dr.Sun Jianchao,Dr.Zhang Xuan,Dr.Zhang Xiaofeng and Dr.Ning Zhe for their support.
The high energy cosmic-radiation detection(HERD)facility is a space mission designed for detecting cosmic ray(CR)electrons,γ-rays up to tens of TeV and CR nuclei from proton to iron up to several PeV.The main instrum...