2023 Fiscal Year Final Research Report
Establishment of event reconstruction technique for fluorescence telescope in future huge cosmic ray observatory
| Project/Area Number |
21K03605
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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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| Review Section |
Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
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| Research Institution | Kanagawa University |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 極高エネルギー宇宙線 / 大気蛍光望遠鏡 / 事象再構成 / フレネルレンズ / 光学シミュレーション / 米国ユタ州 / 焦点面検出器 |
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| Outline of Final Research Achievements |
For future large-scale ultra-high energy cosmic ray observation, we have developed a next-generation fluorescence telescope that is cost-effective and satisfies the required resolution through both of a development of an event reconstruction method that can be used with the telescope alone and an optimization of the focal plane of the telescope.
We developed an event reconstruction method using observed waveforms itself. We also optimized the focal plane of the telescope and developed a new wide-angle telescope with a field of view of 24 × 18 degrees. By applying the developed reconstruction method, the wide-angle telescope has a resolution of 2.3 degrees for the arrival direction, which satisfies a requirement for mass composition measurements. The new telescope was actually constructed at the site of Telescope Array (TA) experiment in the U.S., and its performance is evaluated by simultaneous observations of cosmic rays with the TA experiment.
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| Free Research Field |
極高エネルギー宇宙線、宇宙線の地球科学への応用
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で開発した事象再構成手法や、広角化したことで少数台の検出器で広い面積を安価にカバーする次世代大気蛍光望遠鏡、評価された性能は、将来の大規模極高エネルギー宇宙線観測実験を担う観測手法を選択する際に必要不可欠な情報である。
このような大規模実験が実現されれば、これまで明らかにされていない極高エネルギー宇宙線の起源や加速機構、地球までの伝播過程、宇宙空間の磁場に対する新たな知見を得ることが可能であり、本研究成果はそれを強く推進するものである。
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