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Title: Spiral silicon drift detectors

An advanced large area silicon photodiode (and x-ray detector), called Spiral Drift Detector, was designed, produced and tested. The Spiral Detector belongs to the family of silicon drift detectors and is an improvement of the well known Cylindrical Drift Detector. In both detectors, signal electrons created in silicon by fast charged particles or photons are drifting toward a practically point-like collection anode. The capacitance of the anode is therefore kept at the minimum (0.1pF). The concentric rings of the cylindrical detector are replaced by a continuous spiral in the new detector. The spiral geometry detector design leads to a decrease of the detector leakage current. In the spiral detector all electrons generated at the silicon-silicon oxide interface are collected on a guard sink rather than contributing to the detector leakage current. The decrease of the leakage current reduces the parallel noise of the detector. This decrease of the leakage current and the very small capacities of the detector anode with a capacitively matched preamplifier may improve the energy resolution of Spiral Drift Detectors operating at room temperature down to about 50 electrons rms. This resolution is in the range attainable at present only by cooled semiconductor detectors. 5 refs., 10more » figs.« less
Authors:
; ; ; ; ; ; ; ;
Publication Date:
OSTI Identifier:
6613801
Report Number(s):
BNL-42147; CONF-881103-29
ON: DE89005770
DOE Contract Number:
AC02-76CH00016
Resource Type:
Conference
Resource Relation:
Conference: IEEE nuclear science symposium, Orlando, FL, USA, 9 Nov 1988; Other Information: Portions of this document are illegible in microfiche products
Research Org:
Brookhaven National Lab., Upton, NY (USA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; SI SEMICONDUCTOR DETECTORS; DESIGN; BOUNDARY CONDITIONS; ENERGY RESOLUTION; WAVE FORMS; X-RAY SPECTRA; MEASURING INSTRUMENTS; RADIATION DETECTORS; RESOLUTION; SEMICONDUCTOR DETECTORS; SPECTRA 440104* -- Radiation Instrumentation-- High Energy Physics Instrumentation