| Project/Area Number |
16K05368
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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 | Yamagata University |
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Principal Investigator |
Yoshida Hiroshi 山形大学, 学士課程基盤教育機構, 教授 (80241727)
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| Research Collaborator |
TAJIMA Yasuhisa 山形大学, 学士課程基盤教育機構教育企画部, 准教授 (50311577)
SASAKI Miki
SEKI Yuuto
IWASA Miwa
OIKAWA Hiroki
SUGIHARA Yuuta
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Keywords | 粒子線検出器 / カロリメーター / シンチレーター / 波長変換ファイバー / シンチレーションファイバー / 蛍光寿命 / シンチレックス / MPPC / 粒子測定技術 / 素粒子実験 / 実験核物理 |
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| Outline of Final Research Achievements |
We made basic R&Ds on scintillators and optical devices which compose veto counters of E14 STEP 2 planned as the next project of the K0 rare decay experiment at J-PARC. Especially, we evaluated the capability of a new plastic scintillator "Scintirex" made of polyethylene naphthalate (PEN) as a component of a sandwich calorimeter. We obtained systematic data which showed the existence of temperature quenching and thermoluminescence of the Scintirex. A prototype sampling calorimeter which consisted of lead plates and Scintrex plates was tested by using the positron beam at ELPH. The obtained data showed good linear response and energy resolution. A new generation MPPC could be operated stably under high counting rates with a suitably designed electrical circuit. We have measured fluorescence spectra and decay curves for some polystyrene-based plastic scintillators with the use of a short pulse light source in the wide range from visible to vacuum ultraviolet at UVSOR.
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| Academic Significance and Societal Importance of the Research Achievements |
2011年に産学連携事業により登場した新素材について、実際の検出器に応用してその性能を実証できた一方で、得てして応用先行になりがちなところ、その基礎物性の研究にも取り組み、その素材がもっている欠点（温度消光や熱発光等）についても系統的な測定データを得るなどして、基礎的な裏付けを与えることができた。また、新世代MPPC等新しいデバイスを、素粒子実験の将来計画に効果的に採用できることを実証できた。
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