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Proceedings Paper

Gain depression in MCPs utilized in CCD-readout image intensifiers
Author(s): Annelie W. Glazenborg-Kluttig; John L.A. Fordham
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Paper Abstract

Micro-channel plate (MCP) based "Generation 2" image intensifiers are used for initial photon detection and amplification in modern photon counting detectors in astronomy. Input photons initially create photo-electrons in a photocathode. Each photo-electron is then amplified by the MCP or an MCP stack producing a cloud of electrons that are proximity focused onto an output anode. During the electron amplification process charge is stripped from the walls of the associated pore (or pores if an MCP stack is employed) and this needs to be replenished before full gain amplification of following events can take place. Charge depletion then provides the ultimate limitation to the brightness of a point source that can be observed. Experimental work has been undertaken to measure the effect of gain depression in intensified CCD detectors using intensifiers with both P20 and P46 phosphors. The results, along with a discussion on their relevance to detector dynamic range, will be presented.

Paper Details

Date Published: 29 September 2004
PDF: 10 pages
Proc. SPIE 5499, Optical and Infrared Detectors for Astronomy, (29 September 2004); doi: 10.1117/12.550031
Show Author Affiliations
Annelie W. Glazenborg-Kluttig, ASTRON (Netherlands)
John L.A. Fordham, Univ. College London (United Kingdom)

Published in SPIE Proceedings Vol. 5499:
Optical and Infrared Detectors for Astronomy
James D. Garnett; James W. Beletic, Editor(s)

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