A crosstalk and non-uniformity correction method for the space-borne Compton polarimeter POLAR

doi:10.1016/j.astropartphys.2016.06.007

CORC > 高能物理研究所 > 中国科学院高能物理研究所 > 粒子天体物理中心

	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)
刊名	ASTROPARTICLE PHYSICS
	2016
卷号	83 页码:6
关键词	Multi-anode photomultiplier Non-uniformity Crosstalk Gamma-ray burst Polarization
DOI	10.1016/j.astropartphys.2016.06.007
通讯作者	肖华林
文献子类	Article
英文摘要	In 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.
WOS关键词	GAMMA-RAY BURSTS ; POLARIZATION
语种	英语
WOS记录号	WOS:000382338700002
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/260690]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 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.
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.
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.