Hybrid analog/digital, large format, photon counting detectors for astronomy

Details Hybrid analog/digital, large format, photon counting detectors for astronomy Hybrid analog/digital, large format, photon counting detectors for astronomy

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986spie..627..631c&link_type=abstract

IN: Instrumentation in astronomy VI; Proceedings of the Meeting, Tucson, AZ, Mar. 4-8, 1986. Part 2 (A87-36376 15-35). Bellingha

Astronomy and Astrophysics

Astronomy

Counting Circuits, Microchannel Plates, Photons, Spatial Resolution, Telescopes, Ultraviolet Detectors, Analog To Digital Converters, Charge Coupled Devices, Photocathodes, Pixels

Scientific paper

The development of a new microchannel plate photon-counting detector with an analog readout method based on a resistive anode is reported. This detector exhibits extremely high, stable electron gains of 10 to the 8th. At this gain, the spatial resolution is no longer primarily limited by the noise of the resistive anode, so that digital methods of readout, such as discrete conductors, lose their advantage. These detectors can be readily scaled to 40 mm and 70 mm formats to match plate scales of 2-m (and larger) telescopes. New, high speed digital electronics fully exploit the high spatial and time resolution made possible by gains of this level. Analysis of the theoretical performance of this detector shows that the major limitation to the spatial resolution is the proximity focus of the photocathode and the first microchannel plate. The detector has been mated to an echelle spectrograph developed.

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