[10a-N206-1~10] 2.2 Radiation physics fundamentals & applications, radiation generators, new technology

▲ [10a-N206-9] Development of electron-tracking Compton imaging system with SOI pixel sensor and GFAG-SiPM array

〇(M2)Lan Zhang¹, Mizuki Uenomachi², Kenji Shimazoe¹, Hiroyuki Takahashi¹, Ayaki Takeda³ (1.Tokyo Univ., 2.RIKEN, 3.Miyazaki Univ.)

Keywords:Compton imaging, SOI, electron-tracking

Compton imaging is a traditional way to localize gamma sources based on the interaction of gamma rays followed by Compton scattering. Because of the lost of the information of the ejection directions of recoil electrons, signal-to-noise (SNR) and angular resolution are reduced by the influence of generated artifacts. Electron tracking based Compton imaging is a technique to improve the sensitivity of Compton cameras by measuring the direction of recoiled electrons. We have developed an electron-tracking Compton imaging system by using a combination of a trigger-mode silicon-on-insulator (SOI) pixel detector and a GFAG detector. The SOI sensor consists of 384 ×608 with 36 μm cells. The direction of recoil electrons caused by Compton scattering are detected on the SOI detector. In our experiment, the energy resolution and coincidence time resolution have been tested, which provide information for future electron-tracking Compton camera.