2022 Fiscal Year Final Research Report
Search for Kaluza-Klein axion with xenon gas detector
| Project/Area Number |
19K14738
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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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 | National Institutes for Quantum Science and Technology (2022)
Tohoku University (2019-2021) |
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Principal Investigator |
Obara Shuhei 国立研究開発法人量子科学技術研究開発機構, 次世代放射光施設整備開発センター, 技術員 (70834711)
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | キセノンガス検出器 |
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| Outline of Final Research Achievements |
This study aimed to improve the under-development high-pressure xenon gas detector and explore the undiscovered particle, the KK axion. The operation time was extended by enhancing the data acquisition and readout electronics and conducting a comprehensive review of the gas system, and the effective volume could be increased. Moreover, an energy resolution of 1.73% (FWHM) was achieved for the 511 keV energy. However, the measurement sensitivity has been limited due to triggers caused by natural environmental radiation and cosmic rays. To address this, a new detector is being installed in the Gifu Prefecture's Kamioka mine, which is commonly used for rare event search experiments, and preparations for measurements are currently underway.
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| Free Research Field |
素粒子物理実験
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| Academic Significance and Societal Importance of the Research Achievements |
高圧キセノンガス検出器の開発は、本研究の物理目的以外にもニュートリノを伴わない二重ベータ崩壊探索や暗黒物質探索などにも有用とされており、ヨーロッパや中国などでも類似の検出器開発が進められている。本研究で扱う物理では中でも低エネルギー側および飛跡取得に特化しており、高圧キセノンガス検出器のスケーラビリティとマルチパーパス性が向上する。本研究での物理結果はまだ発表できていないものの、素粒子物理実験における検出器開発という観点で、エネルギーに対して最も大きなダイナミックレンジを保持し様々な物理探索に対応できる検出器を開発することができている。
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