| Budget Amount *help |
¥43,030,000 (Direct Cost: ¥33,100,000、Indirect Cost: ¥9,930,000)
Fiscal Year 2018: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2017: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2016: ¥15,210,000 (Direct Cost: ¥11,700,000、Indirect Cost: ¥3,510,000)
Fiscal Year 2015: ¥20,410,000 (Direct Cost: ¥15,700,000、Indirect Cost: ¥4,710,000)
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| Outline of Final Research Achievements |
The radiation mechanism of gamma rays from gamma ray bursts is still in the mystery. For the elucidation, the observation of the polarization is very useful. However, it is more difficult to detect the polarization of gamma rays than of visible light. Then utilizing the principle of anisotropy for Compton scattering, we have developed two types of Compton scattering polarimeters with high sensitivity and investigated the performance. The former one can only measure the two-dimensional scattering direction and the latter one can obtain the information on the three-dimensional scattering direction. It was recognized that the former one with geometrical area of 3000cm2 can elucidate the radiation mechanism of the gamma ray bursts in two years observation. For the latter one, we confirmed that it can operate as a Compton camera.
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