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Quantum efficiency and stability of alkali halide UV photocathodes in the presence of electric field
| Content Provider | Semantic Scholar |
|---|---|
| Author | Tremsin, Anton S. Siegmund, Oswald H. W. |
| Copyright Year | 2002 |
| Abstract | It was shown previously that CsI sensitivity can be substantially reduced by intense UV irradiation. In the present study we measure the influence of negative and positive electric fields on the degradation of CsI photocathode sensitivity when it is subject to a large dose UV irradiation. The UV sensitivity of positively biased CsI photocathodes did not decay as fast as in case of negatively biased films. Thus we found that negative (photoelectron-extracting) electric field not only increases quantum efficiency of CsI photocathodes (as reported previously by Buzulutskov et. al., J. Appl. Phys. 77 (1995) 2138), especially at long wavelengths, but also substantially reduces the long term performance of the photocathode under intense UV irradiation. Electron-repelling electric field (generally used in MCP detectors with opaque photocathodes), on the other hand, significantly reduces aging of the photocathode under UV irradiation. r 2003 Elsevier Science B.V. All rights reserved. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://psec.uchicago.edu/library/photocathodes/quanteffah.pdf |
| Alternate Webpage(s) | http://www.ssl.berkeley.edu/~ast/Papers/Beaune2002.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Alkalies CSI-DOS Detectors Electroconvulsive Therapy Electron Electrophoresis, Gel, Pulsed-Field Elegant degradation Halide Manuscripts Metals, Alkali Photoelectric effect Preconditioner Quantum electric field funding grant wavelength |
| Content Type | Text |
| Resource Type | Article |
