2016 Fiscal Year Final Research Report
Study of crackling noise for the gravitational wave detector KAGRA
| Project/Area Number |
26287038
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial 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 | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
TAKAHASHI Ryutaro 国立天文台, 重力波プロジェクト推進室, 助教 (60270451)
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| Research Collaborator |
YAMANAKA Yuji
LIU Yingtao
KIRII Shin
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 重力波 / レーザー干渉計 / クラックリング雑音 |
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| Outline of Final Research Achievements |
The geometric anti-spring used for the Japanese gravitational wave detector KAGRA could produce crackling noise, which could impair the target sensitivity of KAGRA. Thus we built a Michelson interferometer consisting of the mirror suspension systems with the small-sized geometric anti-spring units to estimate the crackling noise. First we operated the interferometer with one suspension system. Then we modified the system based on what we learned, and we built the suspension systems for the other mirror and the beam splitter. We also derived the scaling law theoretically and established the requirement of the sensitivity of the experiment. All the preparation was complete to estimate the crackling noise.
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| Free Research Field |
重力波物理学
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