Sealed gaseous photomultiplier with Csl photocathode

摘要

A sealed gaseous photomultiplier tube (PMT) with a Csl photocathode has been developed using a micropattern gas detector (MPGD) made of Pyrex glass. A microblasting technique (MB) was employed for the production of a new hole-type MPGD. We investigated gaseous PMTs with a semi-transparent Csl photocathode for two different gas mixtures of Ne(90%) + i-C_4H_(10) (10%) and Ne (90%)+CF_4 (10%) at a gas pressure of 700 torr. Gains of up to 10~5 were attained with the microblasted glass plate (MB-GP) for both neon gas mixtures. Quantum efficiencies of up to 0.5% were obtained for UV light at the wavelength of 170 nm. The results of the aging test and the characteristics in a high magnetic-field environment are described for the gaseous PMT filled with neon gas mixture.