Open AccessUnipolar charge sensing with coplanar electrodes -- Application to semiconductor detectors
Author(s) -
P.N. Luke
Publication year - 1994
Language(s) - English
Resource type - Reports
DOI - 10.2172/34411
Subject(s) - detector , semiconductor , semiconductor detector , optoelectronics , electrode , trapping , resolution (logic) , charge (physics) , materials science , ion , polarity (international relations) , compound semiconductor , ionization , semiconductor device , charge carrier , physics , chemistry , optics , nanotechnology , computer science , ecology , biochemistry , epitaxy , layer (electronics) , quantum mechanics , artificial intelligence , cell , biology
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 that allows it to be applied to 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. Experiment using a CdZnTe detector demonstrates the effectiveness of this technique. Schemes to correct for electron trapping and to obtain position information are also described