AN OPTICAL-BEAM-INDUCED-CURRENT STUDY OF ACTIVE-REGION AND CHARGE COLLECTION EFFICIENCY OF GAAS PARTICLE DETECTORS

Authors
ALIETTI M BERLUTI L CANALI C CASTALDINI A CAVALLINI A CETRONIO A RINALDI P DAURIA S DELPAPA C LANZIERI C NAVA F PROIA M ZICHICHI A
Citation
M. Alietti et al., AN OPTICAL-BEAM-INDUCED-CURRENT STUDY OF ACTIVE-REGION AND CHARGE COLLECTION EFFICIENCY OF GAAS PARTICLE DETECTORS, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 355(2-3), 1995, pp. 420-424
Citations number
14
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
355
Issue
2-3
Year of publication
1995
Pages
420 - 424
Database
ISI
SICI code
0168-9002(1995)355:2-3<420:AOSOAA>2.0.ZU;2-K
Abstract
In a recent paper, it was described how semi-insulating (SI) liquid en capsulated Czochralski (LEC) gallium arsenide particle detectors made by Alenia SpA have been tested and found to be understandable in terms of one function: the local charge collection efficiency. We have now measured, always within the context of the RD8 experiment, the local c harge collection efficiency for these diodes using a technique called OBIC (optical beam induced current) and derived the active region widt h (W) as a function of bias in a range of values lower than those obta inable with particles. Using data both from OBIC and from the previous paper, W is found to behave approximately linearly as a function of b ias larger than about 50 V. Below this value, W follows a square root law as a function of bias.