Some Ultraviolet Spectral Sensitivity Characteristics of Broadband Multialkali Photocathodes

C. B. Johnson; L. Bonney; R. F. Floryan

doi:10.1117/12.946902

16 August 1988 Some Ultraviolet Spectral Sensitivity Characteristics of Broadband Multialkali Photocathodes

C. B. Johnson, L. Bonney, R. F. Floryan

Proceedings Volume 0932, Ultraviolet Technology II; (1988) https://doi.org/10.1117/12.946902
Event: 1988 Technical Symposium on Optics, Electro-Optics, and Sensors, 1988, Orlando, FL, United States

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.

Citation Download Citation

C. B. Johnson, L. Bonney, and R. F. Floryan "Some Ultraviolet Spectral Sensitivity Characteristics of Broadband Multialkali Photocathodes", Proc. SPIE 0932, Ultraviolet Technology II, (16 August 1988); https://doi.org/10.1117/12.946902

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