| Budget Amount *help |
¥209,950,000 (Direct Cost: ¥161,500,000、Indirect Cost: ¥48,450,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
Fiscal Year 2011: ¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000)
Fiscal Year 2010: ¥80,990,000 (Direct Cost: ¥62,300,000、Indirect Cost: ¥18,690,000)
Fiscal Year 2009: ¥92,300,000 (Direct Cost: ¥71,000,000、Indirect Cost: ¥21,300,000)
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| Outline of Final Research Achievements |
For MeV gamma-ray astronomy, we developed Electron Tracking Compton Camera (ETCC) consisting of TPC and scintillators. By measuring electron tracks, ETCC measures the direction of gamma-rays as a small arc, which provides good background rejection by the dE/dx, and clear imaging. Here a 30cm-cube-ETCC was developed to catch gammas from Crab in SMILE-II balloon with >5σ for 4 hrs in 2013. SMILE-II was irradiated by intense gammas and neutron by 140MeV proton, and measured clear image of a weak RI without the efficiency deterioration under 10 times stronger radiation than space by removing most background by dE/dx. Finally its sensitivity was improved to 8-10σ by attaining the angular resolution of the track to that determined by multiple scattering. Thus we show the ability of ETCC to give a 10 times better significance than standard CCs with a same detection area by ETCC. Based on this technology, 4 modules of 50cm-cube ETCCs in space is expected to exceed over 1mCrab.
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