Speaker
toru moriya
(y)
Description
We have been developing 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. The sensitivity of a photomultiplier is described in terms of its quantum efficiency (QE), i.e., the number of photoelectrons emitted from the photocathode divided by the number of incident photons. The QE is very important for many experiments, especially when dealing with low photon statistics. A concise QE measurement system has been developed to evaluate the characteristics of the sealed gaseous photomultiplier tube (PMT) with a bi-alkali photocathode. The QE measurement system consists of a Xe arc lamp source, reflective optics and filters, a monochromator, and a reference Si photodiode detector. Using the system, we evaluated the QE, gain, and long-term stability of the gaseous PMT. This latest development of the gaseous PMT is described here.
| quote your primary experiment | SHE |
|---|
Author
toru moriya
(y)
Co-authors
Prof.
Fuyuki Tokanai
(Yamagata University)
Mr
Hironobu Kawabata
(BUNKOUKEIKI Co.,Ltd.)
Mr
Hiroyuki Sugiyama
(Hamamatsu Photonics)
Prof.
Horohisa Sakurai
(Yamagata Univ.)
Ms
Mirei Takeyama
(Yamagata Univ.)
Mr
Noboru Ohishi
(Hamamtsu Photonics)
Prof.
Shuichi Gunji
(Yamagata Univ.)
Takayuki SUMIYOSHI
(Tokyo Metropolitan University)
Mr
Takayuki Sohtome
(BUNKOUKEIKI Co.,Ltd.)
Mr
Teruyuki Okada
(Hamamatsu Photonics)
