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Proceedings Paper

Analysis of position error by time constant in read-out resistive network for gamma-ray imaging detection system
Author(s): Su-Jin Jeon; Chang-In Park; Byung-Hee Son; Mi Jung; Teak-Jin Jang; Chun-Sik Lee; Young-Wan Choi
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Paper Abstract

Position-sensitive photomultiplier tubes (PSPMTs) in array are used as gamma ray position detector. Each PMT converts the light of wide spectrum range (100 nm ~ 2500 nm) to electrical signal with amplification. Because detection system size is determined by the number of output channels in the PSPMTs, resistive network has been used for reducing the number of output channels. The photo-generated current is distributed to the four output current pulses according to a ratio by resistance values of resistive network. The detected positions are estimated by the peak value of the distributed current pulses. However, due to parasitic capacitance of PSPMTs in parallel with resistor in the resistive network, the time constants should be considered. When the duration of current pulse is not long enough, peak value of distributed pulses is reduced and detected position error is increased. In this paper, we analyzed the detected position error in the resistive network and variation of time constant according to the input position of the PSPMTs.

Paper Details

Date Published: 3 March 2016
PDF: 6 pages
Proc. SPIE 9751, Smart Photonic and Optoelectronic Integrated Circuits XVIII, 975116 (3 March 2016); doi: 10.1117/12.2212515
Show Author Affiliations
Su-Jin Jeon, Chung-Ang Univ. (Korea, Republic of)
Chang-In Park, Chung-Ang Univ. (Korea, Republic of)
Byung-Hee Son, Chung-Ang Univ. (Korea, Republic of)
Mi Jung, Chung-Ang Univ. (Korea, Republic of)
Teak-Jin Jang, Chung-Ang Univ. (Korea, Republic of)
Chun-Sik Lee, Chung-Ang Univ. (Korea, Republic of)
Young-Wan Choi, Chung-Ang Univ. (Korea, Republic of)


Published in SPIE Proceedings Vol. 9751:
Smart Photonic and Optoelectronic Integrated Circuits XVIII
Sailing He; El-Hang Lee; Louay A. Eldada, Editor(s)

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