Abstract
Abstract
The Gas Microchannel plate Pixel Detector (GMPD) is
purposefully designed and manufactured for astrophysical X-ray
polarization detection, slated for use in various space missions
such as the Cosmic X-ray Polarization Detector (CXPD) CubeSat, Low
Energy Polarimeter Detector (LPD/POLAR-2), and the Chasing All
Transients Constellation Hunters (CATCH). Past research has explored
the polarization and spectral performance of GMPD. This study, for
the first time, experimentally investigates its imaging
characteristics to validate its imaging capabilities. Utilizing a
deconvolution method, we measured the position resolution of GMPD,
revealing distinctions in the detector's imaging capabilities for
X-rays of varying energies and in orthogonal directions. These
research findings will provide targeted insights for optimizing the
photoelectron track reconstruction algorithm and correcting
systematic effects in polarization measurements for future
applications of GMPD.