Development of a 1.5-tonne niobium gravitational radiational antenna

Details Development of a 1.5-tonne niobium gravitational radiational antenna Development of a 1.5-tonne niobium gravitational radiational antenna

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987rsci...58.1910v&link_type=abstract

Review of Scientific Instruments (ISSN 0034-6748), vol. 58, Oct. 1987, p. 1910-1916. Research supported by the Australian Teleco

Physics

14

Field Effect Transistors, Gallium Arsenides, Gravitational Wave Antennas, Niobium, Liquid Helium, Low Temperature

Scientific paper

A 1.5-ton Nb gravitational radiation antenna is described. Problems associated with a noncontacting magnetically levitated parametric upconverter transducer are discussed, and a system using a bonded microwave reentrant cavity and bonded mechanical impedance transformer is described and analyzed in detail. It is shown that such an antenna can be expected to achieve a noise temperature of about 1 mK. An ultralow phase-noise-tunable microwave source for the transducer pump signal is described, as well as precision bonding techniques which yield a mechanical positioning accuracy of 10 to the -6th m, and a reproducibility of 10 to the -8th m.

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