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A crosstalk and non-uniformity correction method for the space-borne Compton polarimeter POLAR
Xiao HL(肖华林); Wu BB(吴伯冰); Bao TW(鲍天威); Chai JY(柴军营); Dong YW(董永伟); Kong MN(孔敏南); Kong SW(孔思伟); Li L(李陆); Liu JT(刘江涛); Liu X(刘鑫); Shi HL(师昊礼); Song LM(宋黎明); Sun JC(孙建超); Wang RJ(王瑞杰); Wen X(文星); Xu HH(徐寒晖); Zhang LY(张来宇); Zhang L(张力); Zhang SN(张双南); Zhang XF(张晓峰); Zhang YJ(张永杰); Xiao, HL; Hajdas, V; Wu, BB; Produit, N; Bao, TW; Batsch, T; Cadoux, F; Chai, JY; Dong, YW; Kong, MN; Kong, SW; Rybka, DK; Leluc, C; Li, L; Liu, JT; Liu, X; Marcinkowski, R; Paniccia, M; Pohl, M; Rapin, D; Shi, HL; Song, LM; Sun, JC; Szabelski, J; Wang, RJ; Wen, X; Xu, HH; Zhang, LY; Zhang, L; Zhang, SN; Zhang, XF; Zhang, YJ; Zwolinska, A
Corresponding Author肖华林
AbstractIn spite of extensive observations and numerous theoretical studies in the past decades several key questions related with Gamma-Ray Bursts (GRB) emission mechanisms are still to be answered. Precise detection of the GRB polarization carried out by dedicated instruments can provide new data and be an ultimate tool to unveil their real nature. A novel space-borne Compton polarimeter POLAR onboard the Chinese space station TG2 is designed to measure linear polarization of gamma-rays arriving from GRB prompt emissions. POLAR uses plastics scintillator bars (PS) as gamma-ray detectors and multi-anode photomultipliers (MAPMTs) for readout of the scintillation light. Inherent properties of such detection systems are crosstalk and non-uniformity. The crosstalk smears recorded energy over multiple channels making both non-uniformity corrections and energy calibration more difficult. Rigorous extraction of polarization observables requires to take such effects properly into account. We studied influence of the crosstalk on energy depositions during laboratory measurements with X-ray beams. A relation between genuine and recorded energy was deduced using an introduced model of data analysis. It postulates that both the crosstalk and non-uniformities can be described with a single matrix obtained in calibrations with mono-energetic X- and gamma-rays. Necessary corrections are introduced using matrix based equations allowing for proper evaluation of the measured GRB spectra. Validity of the method was established during dedicated experimental tests. The same approach can be also applied in space utilizing POLAR internal calibration sources. The introduced model is general and with some adjustments well suitable for data analysis from other MAPMT-based instruments. (C) 2016 Elsevier B.V. All rights reserved.
KeywordMulti-anode photomultiplier Non-uniformity Crosstalk Gamma-ray burst Polarization
Indexed BySCI ; ADS
WOS IDWOS:000382338700002
ADS Bibcode2016APh....83....6X
ADS URLhttps://ui.adsabs.harvard.edu/abs/2016APh....83....6X
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2016APh....83....6X/citations
Citation statistics
Cited Times:10 [INSPIRE]
Cited Times:12 [ADS]
Document Type期刊论文
Recommended Citation
GB/T 7714
Xiao HL,Wu BB,Bao TW,et al. A crosstalk and non-uniformity correction method for the space-borne Compton polarimeter POLAR[J]. ASTROPARTICLE PHYSICS,2016,83:6-12.
APA 肖华林.,吴伯冰.,鲍天威.,柴军营.,董永伟.,...&Zwolinska, A.(2016).A crosstalk and non-uniformity correction method for the space-borne Compton polarimeter POLAR.ASTROPARTICLE PHYSICS,83,6-12.
MLA 肖华林,et al."A crosstalk and non-uniformity correction method for the space-borne Compton polarimeter POLAR".ASTROPARTICLE PHYSICS 83(2016):6-12.
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