Speaker
Mr
Satoshi Ishizawa
(Department of Physics, Yamagata University)
Description
A new glass capillary plate (CP) has been developed for a hole-type micropattern gas detector (MPGD). The developed CP has a funnel structure (funnel-CP) fabricated by utilizing a special manufacturing process for a standard CP. The open to surface area ratio is 83% for the funnel-CP. The higher ratio is expected to improve the collection efficiency of primary electrons created by the radiation because most of the electrons can enter the multiplication region without terminating on the upper CP electrode. Moreover, the higher optical transparency is reliable for digital X-ray radiography and cold neutron imaging. The funnel-CP developed for the first prototype MPGD has a thickness of 300 μm and an effective diameter of 20 mm. The diameter of each hole is 50 μm. The metal electrodes are fabricated onto the two flat surfaces of a plate. Basic performance tests of the hole-type MPGD were carried out with X-ray beams for several gas mixtures based on Ne and Ar at 1 atm. A gain of up to 1×10^4 and an energy resolution of 16% were obtained for 6 keV X-rays. An excellent imaging capability was demonstrated by the X-ray image. We report on the characteristics of the novel hole-type MPGD with the funnel-CP.
Primary author
Mr
Satoshi Ishizawa
(Department of Physics, Yamagata University)
Co-authors
Prof.
Fuyuki Tokanai
(Department of Physics, Yamagata University)
Mr
Masahiro Hayashi
(Electron Tube Division, Hamamatsu Photonics K.K)
Prof.
Shunji Kishimoto
(Institute of Material Structure Science, KEK)
Mr
Sugiyama Hiroyuki
(Electron Tube Division, Hamamatsu Photonics K.K)
Prof.
Takayuki Sumiyoshi
(Department of Physics, Tokyo Metropolitan University)
Mr
Teruyuki Okada
(Electron Tube Division, Hamamatsu Photonics K.K)
Mr
Toru Moriya
(Department of Physics, Yamagata University)
Mr
ryutaro Ito
(Department of Physics, Yamagata University)
