The development decoding algorithms of two-dimensional cross strip anodes image readouts for applications in UV astronomy are described. We present results with Monte Carlo simulation by GEANT4 toolkit, the results show that when the cross strip anode period is 0.5mm and the electrode width is 0.4mm, the spatial resolution accuracy is sufficient to reach better than 5 μm, the temporal resolution accuracy of the event detection can be as low as 100 ps. The influences of the cross strip detector parameters, such as the anode period, the width of anode fingers (electrode), the width of the charge footprint at the anode (determined by the distance and the field between the MCP and the anode), the gain of the MCP and equivalent noise charge (ENC) are also discussed. The development decoding algorithms and simulation results can be useful for the designing and performance improvement of future photon counting imaging detectors for UV Astronomy.
This paper describes the preliminary design and performances of a new developed photon counting imaging detector for
Chinese ChangE-2 EUV explorer mission. The detector consists of microchannel plate (MCP) stacks and wedge and
strip anode and corresponding data read out electronics. The experimental results shows that the new developed detector
has a spatial resolution of about 75μm, image distortions are small and dark noise count rate less than 0.4 counts cm<sup>-2</sup>s<sup>-1</sup>.
The pulse height distribution vs MCP operating voltages and the flat field performances are also discussed.