24 July 2014 The development of gamma-ray burst polarimeter for a small satellite
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We are developing a gamma-ray burst polarimeter for a small satellite. It is Compton-scattering-type polarimeter which consists of segmented plastic scintillator and segmented GAGG scintillator. The scattering position in the plastic scintillator and the absorption position in the GAGG scintillator for incident hard X rays can be read out by multi-anode photomultipliers and avalanche photodiodes, respectively. The detection efficiency and the modulation factor amount to about 21% and 39% at 60 keV, respectively. The geometrical area for one module is about 300 cm2. If two modules will be installed, the polarimeters will measure the polarization for about thirty-five GRBs in two years. Through the observation of the polarization, the radiation mechanism of gamma-ray bursts will be clarified.
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Shuichi Gunji, Shuichi Gunji, Takeshi Nakamori, Takeshi Nakamori, Mitsumasa Sakano, Mitsumasa Sakano, Jun Katagiri, Jun Katagiri, Tatsuya Kishikawa, Tatsuya Kishikawa, Koki Kato, Koki Kato, Sayaka Kimura, Sayaka Kimura, Mika Takakura, Mika Takakura, Yuma Oikawa, Yuma Oikawa, Tatsuya Ueda, Tatsuya Ueda, } "The development of gamma-ray burst polarimeter for a small satellite", Proc. SPIE 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, 91444J (24 July 2014); doi: 10.1117/12.2054708; https://doi.org/10.1117/12.2054708

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