Low capacitance large volume shaped-field germanium detector

A large-volume (150 cm/sup 3/) germanium detector with a full-depletion capacitance of only approximately=1 pf has been fabricated. The effect of impurity space charge was utilized to obtain an appropriate electric field distribution in the detector so that carriers are collected on a small-area ele...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 1989-02, Vol.36 (1), p.926-930
Main Authors: Luke, P.N., Goulding, F.S., Madden, N.W., Pehl, R.H.
Format: Article
Language:English
Subjects:
Capacitance
Coaxial components
Detectors
Electrodes
Electrons
Geometry
Germanium
Kinetic energy
Shape
Spectroscopy
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Summary:A large-volume (150 cm/sup 3/) germanium detector with a full-depletion capacitance of only approximately=1 pf has been fabricated. The effect of impurity space charge was utilized to obtain an appropriate electric field distribution in the detector so that carriers are collected on a small-area electrode. Detectors based on this principle are capable of very-low-noise operation and have immediate applications in experiments for the direct detection of dark matter. Detector pulse shapes and carrier-trapping effects were also examined for possible applications involving higher energy radiations.< >
ISSN:0018-9499
1558-1578
DOI:10.1109/23.34577