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Geard-Ring and Charge Collection Efficiency of GaAs Detector

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Author(s): Andrea Perdochova | Frantisek Dubecky | Vladimir Necas | Bohumir Zatko

Journal: Advances in Electrical and Electronic Engineering
ISSN 1804-3119

Volume: 4;
Issue: 2;
Start page: 75;
Date: 2005;
Original page

Keywords: Detector | tested | vacuum | GaAs.

ABSTRACT
The study present the results of an experimental investigation focused on the inflence of guard-ring on detector charge collection. The tested detector is based on semi-insulating (SI) GaAs substrate with a base thinkness of 250 um, where the depletion region is created by a PN-junction. The experiments were executed in vacuum using the 241 Am source emmitting 5,48 MeV alpha particles. Obtained results show noticeable increase of charges collected with higher collection efficiency in spectrum, when quard-ring was read out together with detector electrode.
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