Resonant parametric transducer
Abstract
Results of the implementation of a resonant parametric transducer to a quantum nondemolition measure of gravitational waves are presented. The gravitational antenna of a given mass and elasticity is coupled to an electric resonant circuit. The solutions of the differential equations of the coupled oscillators show that the system behaves as a parametric converter. The experimental system was cooled to a liquid nitrogen temperature of 50K (under vacuum), obtaining Qfigures of the order of one million. The electrical circuit worked at a resonant frequency of 300 KHz and showed a Q of 400 at 50 K. The results indicate the convenience of working at much higher frequencies, using cavity resonators.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 October 1983
 Bibcode:
 1983STIN...8427995B
 Keywords:

 Coupling Circuits;
 Gravitational Wave Antennas;
 Parametric Amplifiers;
 Quantum Counters;
 Resonant Frequencies;
 Capacitors;
 Cavity Resonators;
 Cryogenic Equipment;
 Mechanical Oscillators;
 Thermal Noise;
 Transducers;
 Electronics and Electrical Engineering