CsBr and CsIUV photocathodes: New results on quantum efficiency and aging

Authors
Singh, BK Shefer, E Breskin, A Chechik, R Avraham, N
Citation
Bk. Singh et al., CsBr and CsIUV photocathodes: New results on quantum efficiency and aging, NUCL INST A, 454(2-3), 2000, pp. 364-378
Citations number
28
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
01689002 → ACNP
Volume
454
Issue
2-3
Year of publication
2000
Pages
364 - 378
Database
ISI
SICI code
0168-9002(20001111)454:2-3<364:CACPNR>2.0.ZU;2-O
Abstract
We report on the photoemission properties of 300 Angstrom thick transmissiv e- and 5000 Angstrom thick reflective UV-sensitive CsBr photocathodes. Foll owing post-evaporation heat treatment at 70 degreesC the absolute quantum e fficiency is 35% at 150 nm, with a red boundary cut-off at about 195 nm. Ex tensive aging studies of CsBr and CsI photocathodes, under high photon flux and under ion bombardment in gas avalanche multiplication mode, were carri ed out for the first time without exposure to air. The results are compared with the previously published data on CsI aging and the methodology of the aging tests is discussed in details. (C) 2000 Elsevier Science B.V. All ri ghts reserved.