Open AccessPulse‐height measurements with a cooled avalanche‐photodiode detector
Author(s) -
Kishimoto Shunji
Publication year - 1998
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049598000041
Subject(s) - avalanche photodiode , preamplifier , detector , optics , materials science , photodiode , optoelectronics , thermoelectric cooling , full width at half maximum , resolution (logic) , apds , discriminator , physics , thermoelectric effect , amplifier , cmos , artificial intelligence , computer science , thermodynamics
A cooled avalanche‐photodiode (APD) detector has been developed for X‐ray diffraction experiments. Although an APD is normally used at room temperature and a high internal gain, the energy resolution can be improved by decreasing temperature and gain. The APD device was cooled to 253 K by a thermoelectric cooler. When the gain was M = 13, the energy resolution was 5% (FWHM) at 16.53 keV with a charge‐sensitive preamplifier. By scanning the discriminator threshold level of a fast‐counting system, energy spectra were obtained at M ≃ 50 and count rates of up to 4.7 × 10 7 s −1 .