| Project/Area Number |
16K05378
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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 | Aichi University of Education |
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Principal Investigator |
Kodama Koichi 愛知教育大学, 教育学部, 教授 (70211901)
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| Co-Investigator(Kenkyū-buntansha) |
市村 雅一 弘前大学, 理工学研究科, 准教授 (20232415)
中村 光廣 名古屋大学, 未来材料・システム研究所, 教授 (90183889)
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| Project Period (FY) |
2016-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | エマルション / 原子核乾板 / アーカイブス / データ共有 / 宇宙線 / 加速器 / 気球実験 / データ公開 / デジタルアーカイブ / 宇宙線（実験） / 素粒子実験 |
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| Outline of Final Research Achievements |
Digital archives for nuclear emulsion data of past experiments, such as in cosmic-ray and accelerator physics, had been studied. Nuclear emulsion is a tracking device with excellent spatial resolution of sub-micron accuracy and have been playing an important role in physics. We are succeeding to develop fast read-out systems for tracks in emulsion and our latest system (HTS) is achieving a speed of 2000m2/year. It is almost equivalent to those of emulsion plates used in the past experiments, in those emulsion plates, analyzed fraction of surface was quite limited, probably less than 1%, due to lack of analysis power and the rest was left un-analyzed. HTS could provide us enough read-out power to analyze all tracks recorded in them. As a first trial, we chose RUNJOB ( RUssia Nippon JOint Balloon program ) experiment. All emulsion plates of 1997 flight had been read-out and minimum bias analysis was tried. Those archived data was also used for educational purposes for students.
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| Academic Significance and Societal Importance of the Research Achievements |
原子核乾板はサブミクロンの３次元位置分解能を持つ素粒子検出器であり、タウニュートリノの研究などにおいて大きな役割を果たしてきたが、その解析は、顕微鏡を使う時間と手間のかかるものであった。我々はこの解析の自動化を進め、現行の装置ＨＴＳは、過去の加速器・気球実験での総乾板面積にほぼ匹敵する、年間読出し面積２０００㎡に到達しつつある。これら過去の実験では、実際に読出した乾板面積は全体の１％に満たず、記録された膨大な飛跡情報のごく一部を活用したに過ぎない。本研究は、これら過去の実験の乾板に記録された全飛跡をＨＴＳで読出し、原子核乾板のミニマムバイアス解析を行おうとする世界初の試みでもある。
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