作者: Keiichi Ogasawara , Stefano A Livi , Mihir I Desai , Robert W Ebert , David J McComas
DOI: 10.1063/1.4927420
关键词: Detector 、 Photodiode 、 APDS 、 Microchannel plate detector 、 Time-of-flight mass spectrometry 、 Optoelectronics 、 Rise time 、 Materials science 、 Avalanche photodiode 、 Mass spectrometry
摘要: This study reports on the performance of Avalanche Photodiodes (APDs) as a timing detector for ion Time-of-Flight (TOF) mass spectroscopy. We found that fast signal carrier speed in reach-through type APD enables an extremely short timescale response with or energy independent <2 ns rise time <200 keV ions (1−40 AMU) under proper bias voltage operations. When combined microchannel plate to detect start electron signals from ultra-thin carbon foil, comprises novel TOF system successfully operates <0.8 intrinsic resolution even using commercial off-the-shelf constant-fraction discriminators. By replacing conventional total-energy detectors TOF-Energy system, APDs offer significant power and savings anti-coincidence background rejection capability future space instrumentation.