Superconducting microwave cavity parametric converter transducer sensitive to 10/sup -19/ M harmonic motion
Toward the development of a transducer suitable for the detection of high frequency gravitational effects, a superconducting microwave coupled-cavity parametric converter transducer has been analyzed, developed and tested. An analysis is presented of the intermodal parametric conversion which is produced by harmonic perturbaton of the length of a 10 GHz TE/sub 011/ mode cylindrical resonant cavity. The converter is examined as a transducer of displacement with harmonic frequency near the intermodal difference frequency. Transducer sensitivity dependence upon cavity tunings, couplings, and Q-factors is analyzed and experimentally tested with excellent agreement. The transducer consists of two identical coupled TE/sub 011/ niobium cavities with one endwall driven into mechanical oscillation by an externally mounted piezoelectric ceramic. A displacement with effective amplitude (3.7 +/- 1.3) x 10/sup -19/ m and frequency 1.13 MHz has been observed by detecting a 10GHz conversion power of 10/sup -21/ watts. This measurement was obtained with 0.12 mJ stored in a cavity resonance with an unloaded Q-factor of 6.7 x 10/sup 8/ at 1.55/sup 0/K. The applications of this device in the detection of high frequency gravitational effects are also discussed. Finally, the prospects for improvement of transducer sensitivity and the ultimate limitations are presented.
- Research Organization:
- Rochester Univ., NY (USA)
- OSTI ID:
- 6213638
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
GRAVITATIONAL WAVE DETECTORS
TRANSDUCERS
DESIGN
PERFORMANCE
EXPERIMENTAL DATA
MICROWAVE RADIATION
SUPERCONDUCTING CAVITY RESONATORS
USES
CAVITY RESONATORS
DATA
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
INFORMATION
MEASURING INSTRUMENTS
NUMERICAL DATA
RADIATION DETECTORS
RADIATIONS
RESONATORS
SUPERCONDUCTING DEVICES
640106* - Astrophysics & Cosmology- Cosmology