AbstractIn EUV and FUV space astronomy applications, the best contemporary detector designs are based on the use of MCPs, due to their ability to deliver photon counting performance with high efficiency. The major unresolved issue is the choice of position readout system for the individual photoevents. Electrical event-readout systems are divided into two classes: the discrete wire anodes (e.g., Codacon and MAMA) that perform coordinate digitization by wire group selection, and the continuous centroid position encoders (e.g., wedge-and-strip, delay line) for which coordinates are digitized in the associated electronics. Here, we discuss how the centroid position encoder techniques overcome the four chief limitations of the discrete-wire readouts—their limited format size, their flat focal surface, their fundamental hex-channel vs. square-pixel moire pattern, and their image undersampling. With these limitations overcome, microchannel based image systems can deliver the performance demanded by the forthcoming generation of applications in space astronomy.
Fundamental and practical limitations of FUV/EUV photon-counting image detectors
Advances in Space Research ; 11 , 11 ; 167-170
01.01.1991
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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