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arXiv 1612.04098astro-ph.IM
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POLAR:专用GRB偏振计的最终校准和飞行性能

POLAR: Final Calibration and In-Flight Performance of a Dedicated GRB Polarimeter

M. Kole, T. W. Bao, T. Batsch, T. Bernasconi, F. Cadoux, J. Y. Chai, Y. W. Dong, N. Gauvin, W. Hajdas, J. J. He, M. N. Kong, S. W. Kong, C. Lechanoine-Leluc, L.… 展开作者

M. Kole, T. W. Bao, T. Batsch, T. Bernasconi, F. Cadoux, J. Y. Chai, Y. W. Dong, N. Gauvin, W. Hajdas, J. J. He, M. N. Kong, S. W. Kong, C. Lechanoine-Leluc, L. Li, Z. H. Li, J. T. Liu, X. Liu, R. Marcinkowski, S. Orsi, M. Pohl, N. Produit, D. Rapin, A. Rutczynska, D. Rybka, H. L. Shi, L. M. Song, J. C. Sun, J. Szabelski, R. J. Wang, Y. J. Wang, X. Wen, B. B. Wu, X. Wu, H. L. Xiao, S. L. Xiong, H. H. Xu, M. Xu, J. Zhang, L. Zhang, L. Y. Zhang, S. N. Zhang, X. F. Zhang, Y. J. Zhang, A. Zwolinska

摘要:

伽玛射线偏振测量是一种新的强有力的工具,可以用来研究天体物理源的辐射过程和辐射发生的环境。然而,迄今为止,由于所涉及的困难,在伽马射线能带中进行了很少成功的偏振测量。POLAR是一种专用偏振计,用于对50-500 keV能量范围内的伽马射线暴发射的偏振进行高精度测量。这种新的偏振计预计每年可探测大约50次伽马射线暴,同时对每年大约10次伽马射线暴进行高精度偏振测量。该仪器于2016年9月15日作为中国第二个空间实验室天宫二号的一部分发射到低地球轨道,并在一周后成功获取数据。该仪器使用由1600个塑料闪烁体条组成的分段闪烁体阵列,由25个平板多阳极光电倍增管读出,以测量入射光子的康普顿散射角。小的分段和相对较大的均匀有效面积使仪器能够测量大量瞬态事件的偏振,如伽马射线暴,在其两年的寿命期间具有前所未有的精度。最后的飞行模型在发射前进行了详细的校准,并进行了密集的空间资格测试,本文将对此进行总结。首先将讨论仪器设计,然后概述地面测试,最后将介绍飞行任务头几周测得的在轨行为。

英文摘要:

Gamma-ray polarimetry is a new powerful tool to study the processes responsible for the emission from astrophysical sources and the environments in which this emission takes place. Few successful polarimetric measurements have however been performed thus far in the gamma-ray energy band due to the difficulties involved. POLAR is a dedicated polarimeter designed to perform high precision measurements of the polarization of the emission from gamma-ray burst in the 50-500 keV energy range. This new polarimeter is expected to detect approximately 50 gamma-ray bursts per year while performing high precision polarization measurements on approximately 10 bursts per year. The instrument was launched into lower earth orbit as part of the second Chinese space lab, the Tiangong-2, on September 15th 2016 and has been taking data successfully since being switched on one week after. The instrument uses a segmented scintillator array consisting of 1600 plastic scintillator bars, read out by 25 flat-panel multi-anode photomultipliers, to measure the Compton scattering angles of incoming photons. The small segmentation and relatively large uniform effective area allow the instrument to measure the polarization of a large number of transient events, such as gamma-ray bursts, with an unprecedented precision during its two year life-time. The final flight model underwent detailed calibration prior to launch as well as intensive space qualification tests, a summary of which will be presented in this paper. The instrument design will be discussed first followed by an overview of the on-ground tests, finally the in-orbit behavior as measured during the first weeks of the mission will be presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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