Acta Optica Sinica, Volume. 33, Issue 11, 1104001(2013)

Study on Characteristic Performance of a MCP-Based Photon-Counting Imaging Detector

Ni Qiliang*
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    A two-dimensional photon-counting imaging detector with induced charge wedge-strip anode in extreme ultraviolet (EUV) region is developed based on the maximal operating temperature of 70 ℃ for CE-3 EUV camera, which will be applied to the characteristic performance test at 70 ℃. The detector is mainly composed of microchannel plate (MCP) stacks operating in pulse-counting mode, wedge-strip position-sensitive anode and correlative analog and data processing circuit. A three-electrode wedge-strip induced-charge position-sensitive anode with 1.5-mm period and 47-mm diameter active area is designed and fabricated, and front-end analog and data circuit with the maximum rate of 200 kHz is also developed. In order to obtain MCP stack′s steady gain and less background noise, the preconditioning of MCP stack including 380 ℃ bake-out for 18 h and 100 μA·h bake-in is done, background rate is measured before and after preconditioning, and the curve of MCP stack′s gain versus high voltage applied to MCP stack is obtained. Operating characteristics of the MCP detector including background rate, spatial resolution are also measured. The life-span of the detector is analyzed. The measured results show that the spatial resolution can reach 5.66 lp/mm, and background noise is less than 1 counts/(s·cm2), they can completely satisfy the requirement of moon-based EUV camera on the spatial resolution, background noise and life-span.

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    Ni Qiliang. Study on Characteristic Performance of a MCP-Based Photon-Counting Imaging Detector[J]. Acta Optica Sinica, 2013, 33(11): 1104001

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    Paper Information

    Category: Detectors

    Received: Apr. 9, 2013

    Accepted: --

    Published Online: Sep. 30, 2013

    The Author Email: Qiliang Ni (niqiliang@hotmail.com)

    DOI:10.3788/aos201333.1104001

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