REFLECTIVE UV PHOTOCATHODES WITH GAS-PHASE ELECTRON EXTRACTION - SOLID, LIQUID, AND ADSORBED THIN-FILMS
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, vol.297, no.1-2, pp.133-147, 1990 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 297 Issue: 1-2
- Publication Date: 1990
- Doi Number: 10.1016/0168-9002(90)91359-j
- Journal Name: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.133-147
- Bursa Uludag University Affiliated: No
Abstract
The photoemission quantum efficiency of reflective photocathodes in methane gas has been investigated in the spectral range between 140 and 250 nm. The spectral response of solid metals and CsI, as well as of liquid and solid TMAE film, have been measured. The high quantum efficiency of CsI (35% at 170 nm) makes it attractive for BaF2 or xenon scintillation detection. A BaF2 crystal coupled to an ionization chamber with a reflective CsI photocathode has been successfully tested. Adsorbed TMAE films can significantly increase the quantum yields of metal and CsI (to 46% at 170 nm), making them suitable for fast RICH and other applications.