[13p-B12-1~18] 2.2 Detection systems

△ [13p-B12-4] Development of hole-type MPGD with funnel-capillary plate

〇Ryutaro Ito¹, Satoshi Ishizawa¹, Fuyuki Tokanai¹, Toru Moriya¹, Hiroyuki Sugiyama², Masahiro Hayashi², Teruyuki Okada², Haruyasu Kondo², Takayuki Sumiyoshi³, Syunji Kishimoto⁴ (1.Yamagata Univ., 2.Hamamatsu Photonics, 3.Tokyo Metropolitan Univ., 4.KEK)

Keywords:micropattern gas detector, capillary plate, PMT

We have been developing a hole-type micropattern gas detector (MPGD) with glass capillary plate for digital X-ray radiography, cold neutron imaging, and gaseous photomultipliers (PMT) for the UV and visible spectral range. A new glass capillary plate (CP) has been developed for the hole-type 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 90% 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. 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. We report on the characteristics of the novel hole-type MPGD with the funnel-CP.