| Budget Amount *help |
¥43,940,000 (Direct Cost: ¥33,800,000、Indirect Cost: ¥10,140,000)
Fiscal Year 2019: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Fiscal Year 2018: ¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000)
Fiscal Year 2017: ¥12,220,000 (Direct Cost: ¥9,400,000、Indirect Cost: ¥2,820,000)
Fiscal Year 2016: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
|
|---|
| Outline of Final Research Achievements |
Electron tracking based Compton imaging is a key technique to improve the sensitivity of Compton cameras by measuring the initial direction of recoiled electrons. We have developed a new Si-CMOS hybrid detector as a scatterer of Compton cameras. It is a Si detector bump-bonded to a CMOS readout integrated circuit to obtain electron trajectories. To acquire the energy and the event timing, signals from back side, in which strip electrodes are implemented. are read out with a timing resolution of few μs. Images of recoiled electron trajectories are obtained successfully from CMOS side. By combining with a 2mm thick CdTe double sided detector, we constructed a Si/CdTe Compton camera. We confirmed that the initial direction of the electron is determined properly and incident directions of gamma-ray photons are successfully reconstructed. An energy resolution of 7.4 keV (FWHM) and an angular resolution of 3.1 degree (FWHM) are obtained from the camera for 662 keV gamma-rays.
|
