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Study on electrode design of PDP-like X-ray detector for enhancement of charge multiplication

Authors
Eom, SangheumKim, JongseokKang, JungwonLee, HakjaeLee, Kisung
Issue Date
1-6월-2015
Publisher
ELSEVIER
Keywords
Gas-filled detectors; Radiation detectors; Sensors; X-ray; X-ray detectors
Citation
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, v.784, pp.60 - 66
Indexed
SCIE
SCOPUS
Journal Title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume
784
Start Page
60
End Page
66
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/93298
DOI
10.1016/j.nima.2014.12.078
ISSN
0168-9002
Abstract
In this article, a two-dimensional detector based on plasma display technology was investigated as a candidate for a flat-panel radiation detector. By using the three-dimensional Garfield code, the dependence of the electric field and multiplication on various electrode structures was examined. Based on the calculation of multiplication, three different electrode designs, including CAC, ridged CAC, and double-ridged CAC structures were selected and prototype detectors adopting these designs were fabricated and tested. The performance of these detectors was evaluated by measuring the charge density and sensitivity. The charge density of the double-ridged CAC detector during the X-ray for the on condition varied from 0.482 up to 2.59 mu C/cm(2) at the address bias scope of -500--1500V, while the cathode voltage was locked at -400 V. The sensitivity of the same detector was 0.596 nC/mR.cm(2) in an electric field of 0.54 V/mu m, which was the highest value. This was about one-third lower than the sensitivity of the amorphous selenium (a-Se) based detector at 10 V/mu m. (C) 2014 Elsevier B.V. All rights reserved.
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