基于电容分割的光子计数成像探测器读出阳极优化设计及仿真

何玲平; 岳巾英; 张宏吉; 陈波

doi:10.3788/CO.20191206.1303

Volume 12 Issue 6

Dec. 2019

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Chinese Optics > 2019 > 12(6): 1303-1310.

HE Ling-ping, YUE Jin-ying, ZHANG Hong-ji, CHEN Bo. Optimization and simulation for photon-counting imaging detector readout anode based on capacitance division[J]. Chinese Optics, 2019, 12(6): 1303-1310. doi: 10.3788/CO.20191206.1303

Citation:

HE Ling-ping, YUE Jin-ying, ZHANG Hong-ji, CHEN Bo. Optimization and simulation for photon-counting imaging detector readout anode based on capacitance division[J]. Chinese Optics, 2019, 12(6): 1303-1310. doi: 10.3788/CO.20191206.1303

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Optimization and simulation for photon-counting imaging detector readout anode based on capacitance division

doi: 10.3788/CO.20191206.1303

1.
Changchun Institute of Optics, Fine Mechanics and Physics, Changchun 130033, China
2.
Changchun Institute of Technology, Changchun 130021, China

Funds:

National Natural Science Foundation of China U1631117

More Information

Corresponding author: HE Ling-ping, E-mail:help@ciomp.ac.cn
Received Date: 29 Jan 2019
Rev Recd Date: 27 Mar 2019
Publish Date: 01 Dec 2019

Abstract

Abstract

This paper proposes a new position-resolving readout anode based on charge capacitance-division, which can improve the spatial resolution and photon counting rate of its detector. Firstly, the key factors affecting the imaging performance of existing photon-counting imaging detectors are introduced and the advantages of using capacitance-division readout anodes are analyzed. Secondly, the principle of charge capacitance-division is theoretically deduced and the relation between photon position and detector signal output is analyzed. Then, based on the theoretical deduction, the impact of a capacitance-division anode's physical parameters on the detector's performance is analyzed. After that, the optimized design principle for a capacitance-division position-resolved anode is proposed. A novel readout anode based on charge capacitance-division for a photon counting detector is designed. Finally, by using the finite element simulation tool COMSOL, a model for that readout anode is established, which is used to simulate the process of position-sensitivity and its accuracy. The simulation results show that the position-resolution performance of the new readout anode with the optimized design is better than 50 μm in most areas.
- photon counting imaging,
- position-resolved anode,
- charge capacitance-division,
- readout anode optimization,
- position correlation

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References(15)

References

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