title: Curved focal plane extreme ultraviolet detector array for a EUV camera on CHANG E lander.
abstract: A novel curved focal plane extreme ultraviolet (EUV) detector array designed for a moon-based EUV camera is demonstrated. The curved focal plane detector array operating in a pulse-counting mode consists of a curved microchannel plate (MCP) stack and an induced charge wedge-strip anode (WSA). The curved MCP is fabricated by firstly thermally slumping of the MCPs, and then followed by optical polishing and core glass etching. By using this technology, curved MCPs with a length-to-diameter (L/D) ratio of 80:1 and a radius of curvature of 150 mm have been successfully achieved. The performance of the curved MCP detector is fully characterized in terms of the background noise, pulse height distribution, gain, image linearity and spatial resolution. It is measured that a spatial resolution of 7.13 lp/mm can be achieved with a background noise of less than 0.3 counts/cm2⋅s. The characterization results indicate that the curved focal plane detector can fulfill the requirements of the moon-based EUV camera.
authors.forename: Q
authors.initials: Q
authors.lastname: Ni
authors.forename: K
authors.initials: K
authors.lastname: Song
authors.forename: S
authors.initials: S
authors.lastname: Liu
authors.forename: L
authors.initials: L
authors.lastname: He
authors.forename: B
authors.initials: B
authors.lastname: Chen
authors.forename: W
authors.initials: W
authors.lastname: Yu