| Project/Area Number |
24540308
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Tohoku Gakuin University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
NEICHI Kazushi 東北学院大学, 経営学部, 教授 (90296012)
YAMAGUCHI Akira 東北大学, 理学研究科, 名誉教授 (60004470)
NARITA Shinya 岩手大学, 工学部, 教授 (80322965)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | GEM / TPC / 液体アルゴン / アバランチェ / コッククロフト / 放射線検出器 / ガス増幅 / Avalanche |
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| Outline of Final Research Achievements |
We study the performance of avalanche detector based on GEM (Gas Electron Multiplier) and operated in an avalanche mode with Ar-CO2 mixture. We tested four gas mixtures by varying the ratios of Ar and CO2, and investigated the properties of the charge gain changed. GEM has 70μm hole-diameter, 140μm apart in pitch, etched on 50μm and 100μm copper-clad kapton. The distance of drift region, the transfer region and the induction region are 2mm each. A detector system with GEM is systematically tested operating in single, tandem and triple GEM, and investigated the gain properties for X-ray from 55Fe. The results show that the maximum charge gains of triple-GEM in Ar-CO2 mixtures was about 10000. Also, we constructed Cockroft-Walton cascade generator to obtained stable ascending electric field in TPC.
Now, we are going on testing the performance of two-phase cryogenic GEM detector.
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