Progress on high-efficiency photocathodes for soft x-ray, EUV, and FUV photon detection

Details Progress on high-efficiency photocathodes for soft x-ray, EUV, and FUV photon detection Progress on high-efficiency photocathodes for soft x-ray, EUV, and FUV photon detection

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993spie.2006...51m&link_type=abstract

Proc. SPIE Vol. 2006, p. 51-58, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IV, Oswald H. Siegmund; Ed.

Astronomy and Astrophysics

Astronomy

1

Scientific paper

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.

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