An advanced inductive transducer for resonant mass gravitational wave detectors

Details An advanced inductive transducer for resonant mass gravitational wave detectors An advanced inductive transducer for resonant mass gravitational wave detectors

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..523..415h&link_type=abstract

GRAVITATIONAL WAVES: Third Edoardo Amaldi Conference. AIP Conference Proceedings, Volume 523, pp. 415-416 (2000).

Physics

Gravitational Wave Detectors And Experiments, Transducers, Superconducting Quantum Interference Devices

Scientific paper

We report on the sensitivity of a transducer which uses a low noise SQUID amplifier. The transducer is made of niobium and was electropolished and heat treated to improve the Qs. The mechanical Q was found to be 3.15×106 at 4 K and the electrical Q was 2.52×105. With a low noise SQUID designed for this transducer, the noise temperature of the transducer was found to be 1.1 mK, of which 0.7 mK was due to the SQUID. This is about 200× larger than the expected noise from the SQUID. Noise from flux trapped on the chip is the most likely cause. .

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