2018 Fiscal Year Final Research Report
Study of Filled Liquid for Efficient Background Reduction in Large Volume Liquid Xenon Detector
| Project/Area Number |
16K05370
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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 | Nihon University (2018)
The University of Tokyo (2016-2017) |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Keywords | 暗黒物質探索 / 光検出器 / 低温物性 / 極低放射能技術 |
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| Outline of Final Research Achievements |
I would like to prepare a method to improve sensitivity in the next or subsequent dark matter search experiment. One approach is to fill the vicinity of the detector surface with a liquid fill liquid and separate it from the liquid xenon area which the event from the dark mater responds to. This is expected to prevent background events from the detector surface from being mistaken as fiducial volume events and to improve the sensitivity of the dark resource search. This filling liquid is required to transmit vacuum ultraviolet light, to be liquid at liquid xenon temperature (－100 deg), to be resistant to physical properties, and to have low background. This study will carry out the selection of this filling liquid and the evaluation of its performance.
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| Free Research Field |
素粒子・原子核物理実験
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| Academic Significance and Societal Importance of the Research Achievements |
液体キセノンは低バックグラウンド実験において、シンチレータ―として、暗黒物質探索だけでなく、太陽ニュートリノ観測、0νββ探索にも大変有望なものであり、将来における大型化が必要不可欠である。よって、本研究は、“想定外”のバックグラウンド事象をコントロールしつつ、大型化のために有用な研究である。
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