| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1827599 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2009 | 5 Pages |
Abstract
We have developed gaseous photomultiplier tubes (PMTs) with a bialkali photocathode, combined with micropattern gas detectors (MPGDs) such as a glass capillary plate (CP), a gas electron multiplier (GEM) and a Micromegas detector. Gaseous PMTs with two different gas mixtures of Ar (90%)+CH4 (10%) and Ne (90%)+CF4 (10%) were investigated at a gas pressure of 1Â atm. Quantum efficiencies of up to 12% were obtained for both neon and argon gas mixtures. A new glass CP made of Pyrex glass has been developed for a hole-type MPGD. The glass is well-suited for high-level cleanliness and reaction conditions required for the production of bialkali photocathodes. A gain of up to 1.5Ã104 and an energy resolution of 23% were obtained for 5.9Â keV X-rays. This latest result and the basic performance of the gaseous PMTs are described.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Fuyuki Tokanai, Takayuki Sumiyoshi, Hiroyuki Sugiyama, Teruyuki Okada, Noboru Ohishi, Takayuki Ohmura, Hirohisa Sakurai, Shuichi Gunji,