The development of gamma-ray burst polarimeter for a small satellite
| Autor: | Takeshi Nakamori, Mitsumasa Sakano, Jun Katagiri, Tatsuya Ueda, Tatsuya Kishikawa, Sayaka Kimura, Koki Kato, Mika Takakura, Yuma Oikawa, Shuichi Gunji |
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| Rok vydání: | 2014 |
| Předmět: |
Physics
Photomultiplier Physics::Instrumentation and Detectors business.industry Astrophysics::High Energy Astrophysical Phenomena Astrophysics::Instrumentation and Methods for Astrophysics Polarimetry Polarimeter Scintillator Radiation Polarization (waves) Avalanche photodiode Optics Optoelectronics business Gamma-ray burst |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.2054708 |
| Popis: | 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 cm 2 . 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. |
| Databáze: | OpenAIRE |
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