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Proceedings Paper

High photon counting efficiency in the near-IR (0.6 um--0.9 um) with a GaAs Ranicon
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Paper Abstract

Results are presented of an evaluation of the first RANICON detector with a Negative Electron Affinity (NEA) photocathode, known as the Red-RANICON. The Red-RANICON offers a photocathode responsive quantum efficiency of about 22 percent from 0.6 - 0.9 micron, yielding a significant improvement in photon counting performance when compared with multialkali (S20) photocathode detectors. The operating characteristics of the Red-RANICON are similar to standard 25-mm active-area RANICONS, with imaging formats of 512 x 512 or 1024 x 1024 pixels. Spatial resolution is currently about 80 microns FWHM and could be improved to 40 microns FWHM with a modest decrease in the photocathode to microchannel-plate gap. The application of the Red-RANICON to high-resolution imaging and other applications requiring excellent temporal resolution is discussed. Future prospects for improving the long-wavelength response and quantum yield are also explored.

Paper Details

Date Published: 1 July 1990
PDF: 6 pages
Proc. SPIE 1235, Instrumentation in Astronomy VII, (1 July 1990); doi: 10.1117/12.19083
Show Author Affiliations
Mark Clampin, Johns Hopkins Univ. (United States)
Francesco Paresce, Space Telescope Science Institute (Germany)

Published in SPIE Proceedings Vol. 1235:
Instrumentation in Astronomy VII
David L. Crawford, Editor(s)

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