2014 Fiscal Year Final Research Report
Improvement of a liquid xenon detector for low threshold and high accuracy and search for anual modulation signals caused by dark matter particle using the detector
| Project/Area Number |
25800132
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Keywords | 暗黒物質 / 高精度化 / 低エネルギー線源 / 季節変動 |
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| Outline of Final Research Achievements |
We developped a new X-ray source which makes it possible to understand responses of a liquid xenon detector for low energy (< 10 keV) events expected to be caused by dark matter particles. We evaluated several optical parameters that are absorption and scattering lengths of liquid xenon and reflections of surface of detector vessel. Owing to deep understanding of detector, uncertainties for energy scale were drastically reduced by this study.
By operating above improved detector stably for more than a year, we conducted dark matter search experiment using annual modulation signals.
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| Free Research Field |
実験素粒子物理学
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