Effectiveness Study of Calibration and Correction Algorithms on the Prototype of the POLAR-2/LPD Detector

Document detail

ID

oai:arXiv.org:2407.14243

Topic

Astrophysics - Instrumentation and... High Energy Physics - Experiment

Author

Yi, Difan Liu, Qian Liu, Hongbang Xie, Fei Feng, Huanbo Feng, Zuke Li, Jin Liang, Enwei Zheng, Yangheng

Year

2024

listing date

7/24/2024

Keywords

degree systematic modulation

Metrics

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 POLAR-2/Low-Energy X-ray Polarization Detector (LPD).

Additionally, we propose 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 the Imaging X-Ray Polarimetry Explorer (IXPE) above 5 keV.

Yi, Difan,Liu, Qian,Liu, Hongbang,Xie, Fei,Feng, Huanbo,Feng, Zuke,Li, Jin,Liang, Enwei,Zheng, Yangheng, 2024, Effectiveness Study of Calibration and Correction Algorithms on the Prototype of the POLAR-2/LPD Detector