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Proceedings Paper

Some Ultraviolet Spectral Sensitivity Characteristics of Broadband Multialkali Photocathodes
Author(s): C. B. Johnson; L. Bonney; R. F. Floryan
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Paper Abstract

Window and photocathode combinations are used to produce detectors having broadband spectral sensitivities. Using synthetic fused silica input windows and multialkali photocathodes, useful sensitivities are produced in the 160 - 900 nm spectral range. Interesting and strongly wavelength dependent sensitivity and photoelectron emission energy effects are observed in the uv and near-uv spectral regions. A physical model is proposed to describe the observations, based upon wavelength dependent photon absorption, single and multiple photoelectron emission, and thin-film interference effects. These window/photocathode combinations are used in microchannel plate (MCP) photomultiplier tubes (PMTS), MCP image tubes, and position-sensing-PMTS. A near-uv transmissive fiber-optic window/cathode assembly is used on a streak-tube, and its characteristics are also discussed.

Paper Details

Date Published: 16 August 1988
PDF: 6 pages
Proc. SPIE 0932, Ultraviolet Technology II, (16 August 1988);
Show Author Affiliations
C. B. Johnson, ITT Electro-Optical Products Division (United States)
L. Bonney, ITT Electro-Optical Products Division (United States)
R. F. Floryan, ITT Electro-Optical Products Division (United States)

Published in SPIE Proceedings Vol. 0932:
Ultraviolet Technology II
Robert E. Huffman, Editor(s)

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