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Proceedings Paper

Progress on high-efficiency photocathodes for soft x-ray, EUV, and FUV photon detection
Author(s): Daniel R. Marsh; Oswald H. W. Siegmund; Joseph M. Stock
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Paper Abstract

We report on progress in the development of high quantum detection efficiency photocathodes for microchannel plate based photon detectors to increase soft X-ray, EUV and FUV response. Initial investigations of NaBr, KI and CsBr opaque photocathodes are discussed. All show QDE's of approximately 40% in the 300 - 1000 angstroms regime, and QDE > 60% at approximately 100 angstroms. KI also shows high QDE, approximately 60%, for soft X-rays (approximately 11 angstroms). Photoelectron energy and number distributions are also presented. Lifetest measurements on KBr and CsBr photocathodes show good long term stability for storage in dry nitrogen. A co-evaporated photocathode is also evaluated.

Paper Details

Date Published: 19 November 1993
PDF: 8 pages
Proc. SPIE 2006, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IV, (19 November 1993); doi: 10.1117/12.162830
Show Author Affiliations
Daniel R. Marsh, Univ. of California/Berkeley (United States)
Oswald H. W. Siegmund, Univ. of California/Berkeley (United States)
Joseph M. Stock, Univ. of California/Berkeley (United States)


Published in SPIE Proceedings Vol. 2006:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IV
Oswald H. W. Siegmund, Editor(s)

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