Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991rsci...62..595s&link_type=abstract
Review of Scientific Instruments (ISSN 0034-6748), vol. 62, March 1991, p. 595-599.
Astronomy and Astrophysics
Astronomy
3
Cameras, Image Intensifiers, Microchannel Plates, Photon Beams, Radiation Counters, Astronomical Photography, Atmospheric Turbulence, Speckle Interferometry
Scientific paper
PAPA (precision analog photon address) cameras are photon counting imagers which employ microchannel plates (MCPs) for image intensification. They have been used extensively in astronomical speckle imaging. The PAPA camera can produce artifacts when light incident on its MCP is highly concentrated. The effect is exacerbated by adjusting the strobe detection level too low, so that the camera accepts very small MCP pulses. The artifacts can occur even at low total count rates if the image has highly a concentrated bright spot. This paper describes how to optimize PAPA camera electronics, and describes six techniques which can avoid or minimize addressing errors.
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