Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/4501
Title: Non-linear behaviour of large-area avalanche photodiodes
Authors: Fernandes, L. M. P. 
Lopes, J. A. M. 
Monteiro, C. M. B. 
Santos, J. M. F. dos 
Morgado, R. E. 
Keywords: Scintillation detectors; X-ray detectors; Avalanche photodiodes
Issue Date: 2002
Citation: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 478:1-2 (2002) 395-399
Abstract: The characterisation of photodiodes used as photosensors requires a determination of the number of electron-hole pairs produced by scintillation light. One method involves comparing signals produced by X-ray absorptions occurring directly in the avalanche photodiode with the light signals. When the light is derived from light-emitting diodes in the 400-600 nm range, significant non-linear behaviour is reported. In the present work, we extend the study of the linear behaviour to large-area avalanche photodiodes, of Advanced Photonix, used as photosensors of the vacuum ultraviolet (VUV) scintillation light produced by argon (128 nm) and xenon (173 nm). We observed greater non-linearities in the avalanche photodiodes for the VUV scintillation light than reported previously for visible light, but considerably less than the non-linearities observed in other commercially available avalanche photodiodes.
URI: http://hdl.handle.net/10316/4501
Rights: openAccess
Appears in Collections:FCTUC Física - Artigos em Revistas Internacionais

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