Lifetime of MCP–PMT
نویسندگان
چکیده
To examine the lifetime of a micro-channel plate photo-multiplier tube, we measured its basic performance, gain, quantum efficiency (QE), transit time spread and dark counts as a function of the integrated amount of irradiated photons up to 2:8 10 photons=cm, corresponding to a 14-year time duration under supposed super-KEKB experimental conditions. The effect of the ion-feedback protection layer was clearly detected and the deterioration of the photo-cathode functioning was examined in terms of the QE spectrum on the light wavelength. r 2006 Elsevier B.V. All rights reserved. PACS: 85.60.Ha; 29.40.Ka; 42.79.Pw
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