| Full text | |
| Author(s): |
Total Authors: 4
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| Affiliation: | [1] Univ Western Australia, Sch Phys, Crawley 6009 - Australia
[2] ARC Ctr Excellence Engn Quantum Syst EQuS, 35 Stirling Hwy, Crawley 6009 - Australia
[3] Natl Inst Space Res INPE, Astrophys Div, Ave Astronautas 1758, Sao Jose Dos Campos - Brazil
Total Affiliations: 3
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| Document type: | Journal article |
| Source: | Classical and Quantum Gravity; v. 34, n. 17 SEP 7 2017. |
| Web of Science Citations: | 0 |
| Abstract | |
We present the characterisation of the most recent parametric transducers designed to enhance the Mario Schenberg gravitational wave detector sensitivity. The transducer is composed of a microwave re-entrant cavity that attaches to the gravitational wave antenna via a rigid spring. It functions as a three-mode mass-spring system; motion of the spherical antenna couples to a 50 mu m thick membrane, which converts its mechanical motion into a frequency shift of the cavity resonance. Through the optical spring effect, the microwave transducer frequency-displacement sensitivity was measured to be 726 MHz mu m(-1) at 4 K. The spherical antenna detection sensitivity is determined analytically using the transducer amplification gain and equivalent displacement noise in the test setup, which are 5.5 x 10(11) V m(-1) and 1.8 x 10(-19) m root Hz(-1), respectively. (AU) | |
| FAPESP's process: | 98/13468-9 - The Schenberg detector: proposal for the project, construction, and operation of a 0.6-meter diameter spherical gravitational wave detector |
| Grantee: | Odylio Denys de Aguiar |
| Support Opportunities: | Regular Research Grants |