A new prototype of two-dimensional photon-counting imaging detector with a bare microchannel plate (MCP) stack and induced charge wedge-strip anode in extreme ultraviolet (EUV) region has been developed, which will be applied to a moon-based EUV camera. The detector mainly is composed of a MCP stack operating in pulse-counting mode, induced charge wedge-strip anode (WSA) and correlative analog and data processing circuit. A three electrode wedge-strip position-sensitive anode with 1.5 mm period and 48 mm diameter active area was fabricated by picosecond laser processing technology, and front-end analog and data circuit with maximum rate 300kHz also been developed. Operating characteristics of the prototype of MCP detector including background rate, pulse height distribution, gain, image linearity and spatial resolution were measured. The measured results show that the spatial resolution can arrive at 5linepair/mm, this responds to 0.2 mm, background rate is less than 1counts/cm²•s. These specifications can completely satisfy the requirement of moon-based EUV camera on the spatial resolution and background rate.

Date Published: 21 August 2013
PDF: 6 pages
Proc. SPIE 8908, International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications, 89081Q (21 August 2013);

Published in SPIE Proceedings Vol. 8908:
International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications
Jun Ohta; Nanjian Wu; Binqiao Li, Editor(s)