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Proceedings Paper

The POLAR gamma-ray burst polarimeter onboard the Chinese Spacelab
Author(s): Silvio Orsi; Franck Cadoux; Catherine Leluc; Mercedes Paniccia; Martin Pohl; Divic Rapin; Neal Gauvin; Nicolas Produit; Tianwei Bao; Junying Chai; Yongwei Dong; Minnan Kong; Li Lu; Jiangtao Liu; Xin Liu; Haoli Shi; Jianchao Sun; Ruijie Wang; Xing Wen; Bobing Wu; Hualin Xiao; Hanhui Xu; Li Zhang; Laiyu Zhang; Shuangnan Zhang; Yongjie Zhang; Ilia Britvich; Wojtek Hajdas; Radoslaw Marcinkowski; Dominik K. Rybka; Tadeusz Batsch; Aleksandra Rutczynska; Jacek Szabelski; Ania Zwolinska
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Paper Abstract

POLAR is a joint European-Chinese experiment aimed at a precise measurement of hard X-ray polarization (50-500 keV) of the prompt emission of Gamma-Ray Bursts. The main aim is a better understanding of the geometry of astrophysical sources and of the X-ray emission mechanisms. POLAR is a compact Compton polarimeter characterized by a large modulation factor, effective area, and field of view. It consists of 1600 low-Z plastic scintillator bars read out by 25 at-panel multi-anode photomultipliers. The incoming X-rays undergo Compton scattering in the bars and produce a modulation pattern; experiments with polarized synchrotron radiation and GEANT4 Monte Carlo simulations have shown that the polarization degree and angle can be retrieved from this pattern with the accuracy necessary for identifying the GRB mechanism. The flight model of POLAR is currently under construction in Geneva. The POLAR instrument will be placed onboard the Chinese spacelab TG-2, scheduled for launch in low Earth orbit in 2015. The main milestones of the space qualification campaign will be described in the paper.

Paper Details

Date Published: 24 July 2014
PDF: 9 pages
Proc. SPIE 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, 91440M (24 July 2014); doi: 10.1117/12.2055910
Show Author Affiliations
Silvio Orsi, Univ. de Genève (Switzerland)
Franck Cadoux, Univ. de Genève (Switzerland)
Catherine Leluc, Univ. de Genève (Switzerland)
Mercedes Paniccia, Univ. de Genève (Switzerland)
Martin Pohl, Univ. de Genève (Switzerland)
Divic Rapin, Univ. de Genève (Switzerland)
Neal Gauvin, ISDC Data Ctr. for Astrophysics, Univ. de Genève (Switzerland)
Nicolas Produit, ISDC Data Ctr. for Astrophysics, Univ. de Genève (Switzerland)
Tianwei Bao, Institute of High Energy Physics (China)
Junying Chai, Institute of High Energy Physics (China)
Yongwei Dong, Institute of High Energy Physics (China)
Minnan Kong, Institute of High Energy Physics (China)
Li Lu, Institute of High Energy Physics (China)
Jiangtao Liu, Institute of High Energy Physics (China)
Xin Liu, Institute of High Energy Physics (China)
Haoli Shi, Institute of High Energy Physics (China)
Jianchao Sun, Institute of High Energy Physics (China)
Ruijie Wang, Institute of High Energy Physics (China)
Xing Wen, Institute of High Energy Physics (China)
Bobing Wu, ISDC Data Ctr. for Astrophysics, Univ. de Geneva (Switzerland)
Hualin Xiao, Institute of High Energy Physics (China)
Hanhui Xu, Institute of High Energy Physics (China)
Li Zhang, Institute of High Energy Physics (China)
Laiyu Zhang, Institute of High Energy Physics (China)
Shuangnan Zhang, Institute of High Energy Physics (China)
Yongjie Zhang, Institute of High Energy Physics (China)
Ilia Britvich, Paul Scherrer Institut (Switzerland)
Wojtek Hajdas, Paul Scherrer Institut (Switzerland)
Radoslaw Marcinkowski, Paul Scherrer Institut (Switzerland)
Dominik K. Rybka, Paul Scherrer Institut (Switzerland)
National Ctr. for Nuclear Research (Poland)
Tadeusz Batsch, National Ctr. for Nuclear Research (Poland)
Aleksandra Rutczynska, National Ctr. for Nuclear Research (Poland)
Jacek Szabelski, National Ctr. for Nuclear Research (Poland)
Ania Zwolinska, National Ctr. for Nuclear Research (Poland)


Published in SPIE Proceedings Vol. 9144:
Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray
Tadayuki Takahashi; Jan-Willem A. den Herder; Mark Bautz, Editor(s)

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