LSO/photodiode and LSO avalanche photodiode detectors

Author

Melcher, C.L.

Author_Institution

Schlumberger-Doll Res., Ridgefield, CT, USA

fYear

1992

fDate

25-31 Oct 1992

Firstpage

123

Abstract

The performance of Lu_2(1-x)Ce_2x(SiO₄)O (LSO) detectors was assessed under laboratory conditions. The PMT (photomultiplier tube) and the APD (avalanche photodiode) gave the same energy resolution when used with LSO, although the APD displayed a thermal noise threshold of 30 keV compared to <5 keV for the PMT. The PD resulted in a power energy resolution of 14% and also a considerably higher noise threshold of 140 keV. One notable advantage of LSO scintillators over CsI(Tl) and CdWO₄ when used with APD detectors is the short decay time of 40 ns. This allows the use of much shorter amplifier shaping times, 0.25 μs for LSO compared to 3-20 μs for CsI(Tl) of CdWO₄, which dramatically improves the count-rate capability of the detector as well as the ratio of signal to noise

Keywords

avalanche photodiodes; photodiodes; scintillation counters; semiconductor device noise; thermal noise; 0.25 mus; 140 keV; 30 keV; LSO detectors; Lu_2(1-x)Ce_2x(SiO₄)O; amplifier shaping times; avalanche photodiode detectors; energy resolution; photodiode detectors; photomultiplier tube; signal noise ratio; thermal noise threshold; Aluminum; Assembly; Avalanche photodiodes; Detectors; Packaging; Photomultipliers; Pulse amplifiers; Pulse measurements; Temperature; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference, 1992., Conference Record of the 1992 IEEE

Conference_Location

Orlando, FL

Print_ISBN

0-7803-0884-0

Type

conf

DOI

10.1109/NSSMIC.1992.301134

Filename

301134