Physics – Condensed Matter – Superconductivity
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jphd...16..105m&link_type=abstract
Journal of Physics D - Applied Physics, vol. 16, Feb. 14, 1983, p. 105-113. Research supported by the Australian Research Grant
Physics
Condensed Matter
Superconductivity
7
Gravitational Waves, Microwave Oscillators, Parametric Frequency Converters, Radiation Detectors, Superconductivity, Frequency Response, Klystrons, Niobium, Resonant Frequencies, Superhigh Frequencies, Transducers
Scientific paper
A superconducting-cavity stabilized oscillator has been constructed which combines active and passive stabilization of a 9.6 GHz klystron to obtain a phase noise power spectral density between -170 dB Hz and -180 dB Hz at 5 kHz from the carrier, which represents about 40 dB improvement over the state-of-the-art. The device has been developed for use as a low noise pump for a superconducting parametric upconverter transducer on a gravitational radiation antenna. An RF modulated reflex klystron is actively locked to a TE(011) niobium cavity operated at 2 K with a loaded Q approximately equal to 10 to the 8th. Power is extracted from the cavity which acts as a high Q filter.
Blair David Gerald
Mann Graham A.
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