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

Daniel R. Marsh; Oswald H. W. Siegmund; Joseph M. Stock

doi:10.1117/12.162830

19 November 1993 Progress on high-efficiency photocathodes for soft x-ray, EUV, and FUV photon detection

Daniel R. Marsh, Oswald H. W. Siegmund, Joseph M. Stock

Proceedings Volume 2006, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IV; (1993) https://doi.org/10.1117/12.162830
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

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.

Citation Download Citation

Daniel R. Marsh, Oswald H. W. Siegmund, and Joseph M. Stock "Progress on high-efficiency photocathodes for soft x-ray, EUV, and FUV photon detection", Proc. SPIE 2006, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IV, (19 November 1993); https://doi.org/10.1117/12.162830

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