인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
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지원사업
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커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
피인용 0
초록·키워드
This study proposes a scalable winner-takes-all (WTA) circuit for thallium-doped cesium iodide CsI(Tl) Geiger-mode avalanche photodiode (GAPD) radiation detectors. The proposed circuit was implemented and evaluated in a proof-of-concept 4×4 CsI(Tl)-GAPD radiation detector. The uniformity of the photopeak position was assessed before and after gain correction. The performance of the radiation detector was also measured at various GAPDs bias voltages. With a trigger activation duration of 500 ns, the analog signal reset mechanism functioned effectively without significantly affecting the analog output signal. Gain correction in the gain-level adjustment block significantly improved the uniformity of the photopeak positions in the energy spectra, reducing the ratio of the highest to lowest photopeak positions from 1.3 to 1.0. As the bias voltage increased, the photopeak position linearly increased from 507.4 to 1444.7 due to the increasing gain of the GAPDs. The best energy resolution was obtained at a bias voltage of 27.8 V, which was 3.1 V above the breakdown voltage in our experimental setup. This study demonstrated the feasibility of the WTA circuit for the CsI(Tl)-GAPD radiation detector and highlighted the potential advantages of the scalable WTA circuit for developing MR-compatible radiation detectors with multiple input channels.
본문·목차
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