Unipolar charge sensing with coplanar electrodes-application to semiconductor detectors

A novel method to perform preferential sensing of single-polarity charge carriers in ionization detectors is presented. It achieves the same function as Frisch grids commonly employed in gas ion chambers but uses a coplanar electrode configuration suitable for semiconductor detectors. Through the us...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 1995-08, Vol.42 (4), p.207-213
Main Author: Luke, P.N.
Format: Article
Language:English
Subjects:
Charge carrier processes
Electrodes
Electron mobility
Exact sciences and technology
Experimental methods and instrumentation for elementary-particle and nuclear physics
Gamma ray detection
Gamma ray detectors
Nuclear physics
Physics
Radiation detectors
Radiation detectors, dosimeters
Semiconductor radiation detectors
Signal detection
Signal generators
Silicon radiation detectors
Solid-state detectors
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Summary:A novel method to perform preferential sensing of single-polarity charge carriers in ionization detectors is presented. It achieves the same function as Frisch grids commonly employed in gas ion chambers but uses a coplanar electrode configuration suitable for semiconductor detectors. Through the use of this method, good energy resolution can be obtained from room-temperature compound semiconductor detectors despite their poor hole-collection characteristics. Experiments using a CdZnTe detector demonstrate the effectiveness of this technique. Schemes to correct for electron trapping and to obtain position information are also described.< >
ISSN:0018-9499
1558-1578
DOI:10.1109/23.467848