2014 Fiscal Year Final Research Report
Development of gaseous PMT with new glass material
| Project/Area Number |
25610048
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Yamagata University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Keywords | マイクロパターンガス検出器 / 光検出器 |
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| Outline of Final Research Achievements |
We have been developing gaseous photomultiplier tubes (PMTs) with alkali photocathode combined with micropattern gas detectors (MPGDs). In this study, we have developed a new hole-type MPGD with a crystallized photosensitive etching glass (PEG3C) developed by Hoya Corporation. At first, we fabricated a GP using PEG3C performance test was carried out using an X-ray beam. We successfully obtained an effective gain of 5000 and an energy resolution of 17% for 6 keV X-rays using a single GP, whereas we achieved an effective gain of up to 60000 in a tandem operation using a double GP. Next, we tried to develop a gaseous PMT with a bialkali photocathode using a GP made of PEG3C. The basic characteristic was investigated by irradiating visible light. As a result, the rise time of 9 ns was obtained for charge signal from the anode of gaseous PMT filled with Ne(90%)+CF4(10%) at a gas pressure of 0.9 atm. The quantum efficiency of 11% at wavelength 400 nm was achieved for the gaseous PMT.
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| Free Research Field |
原子核実験、宇宙線実験
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