MG13 - Talk detail |
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Participant |
Ju, Li | |||||||
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Institution |
The University of Western Australia - 35 Striling Highway - Perth - Westeran Australia - Australia | |||||||
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Session |
GW4 |
Accepted |
Yes |
Order |
7 |
Time |
17:20 - 17:45 | 25' |
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Talk |
Oral abstract |
Title |
Ultralow frequency isolation stages for Third Generation Gravitational Wave Detectors | |||||
| Co-authors | Jean-Charles Dumas, Chunnong Zhao, Siddartha S Verma, David Blair | |||||||
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Abstract |
Proposed 3rd generation ground-based gravitational wave detectors aim to significantly enhance the sensitivity of the advanced detectors by achieving lower frequency response and reduced quantum noise. Improved low frequency sensitivity requires improved vibration isolation systems, while thermal noise minimisation requires cryogenics. At UWA we have demonstrated novel isolation systems that can achieve very low frequency performance without requiring large physical scales. The designs avoid large mechanical stresses while vertical stages reduce the elastic stored energy by 1-2 orders of magnitude. This enables spring mass to be greatly reduced while minimising the effects of internal mode resonances. They are suitable for cryogenic applications and 1-tonne test masses. We will present the new Euler-Lacoste linkage which enables very soft vertical suspension, and the Roberts Linkage for which we recently demonstrated intrinsic actuation in the DC to 1Hz band. |
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