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...