Subjects: Physics >> Nuclear Physics submitted time 2024-02-21
Abstract： Gaseous X-ray polarimetry refers to a class of detectors used for measuring the polarization of soft X-rays.
The systematic effects of such detectors introduce residual modulation, leading to systematic biases in the
polarization detection results of the source. This paper discusses the systematic effects and their calibration and
correction using the Gas Microchannel Plate–Pixel Detector(GMPD) prototype for Polar2/Low Energy X-ray
Polarization Detector(LPD). Additionally, we proposes an algorithm that combines parameterization with Monte
Carlo simulation and Bayesian iteration to eliminate residual modulation. The residual modulation after data
correction at different energy points has been reduced to below 1%, and a good linear relationship is observed
between the polarization degree and modulation degree. The improvement in modulation degree after correction
ranges from 2% to 15%, and the results exceed those of IXPE above 5 keV.
Peer Review Status:
Awaiting Review
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