Large-area APDs and monolithic APD arrays

Author

Shah, K.S. ; Farrell, R. ; Grazioso, R. ; Myers, R. ; Cirignano, L.

Author_Institution

Radiat. Monitoring Devices Inc., Watertown, MA, USA

Volume

48

Issue

6

fYear

2001

Firstpage

2352

Lastpage

2356

Abstract

In this paper, development of large-area planar avalanche photodiodes (APDs) and monolithic APD arrays for X-ray and scintillation detection is discussed. Single APDs with areas as large as 10 cm/sup 2/ have been fabricated and tested with a CsI(Tl) scintillator (3.8 cm diameter, 2.5 cm height). The resolution of the 662 keV photopeak has been measured to be 9% (FWHM). The X-ray detection performance, gain, and noise of these large APDs have been characterized. Multielement APD arrays have also been fabricated in various formats, such as 4/spl times/4 to 14/spl times/14 elements (2 mm pixels), and the uniformity of gain, noise, and sensitivity has been evaluated for 4/spl times/4 arrays using an /sup 55/Fe source. Timing properties have been measured. Packaging issues related to the APD arrays are discussed.

Keywords

X-ray detection; avalanche photodiodes; monolithic integrated circuits; position sensitive particle detectors; silicon radiation detectors; solid scintillation detectors; 14 pixel; 2 mm; 2.5 cm; 3.8 cm; 4 pixel; 662 keV; CsI(Tl) scintillator; X-ray detection; detection performance; gain; large-area planar avalanche photodiodes; monolithic APD arrays; multielement APD arrays; multipixel silicon detector; noise; scintillation detection; Avalanche photodiodes; Etching; Fabrication; Packaging; Shape; Silicon; Solid scintillation detectors; Timing; X-ray detection; X-ray detectors;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.983267

Filename

983267