Two stage superconducting quantum interference device amplifier in a high-Q gravitational wave transducer
| Autor: | Gregory M. Harry, Thomas R. Stevenson, Ho Jung Paik, Insik Jin, Frederick C. Wellstood |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1999 |
| Předmět: |
Physics
Noise temperature Physics - Instrumentation and Detectors Physics and Astronomy (miscellaneous) Condensed matter physics Gravitational wave business.industry Amplifier Condensed Matter - Superconductivity FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) Instrumentation and Detectors (physics.ins-det) Chip Noise (electronics) General Relativity and Quantum Cosmology law.invention SQUID Superconductivity (cond-mat.supr-con) Transducer Optics law Antenna (radio) business |
| Popis: | We report on the total noise from an inductive motion transducer for a gravitational-wave antenna. The transducer uses a two-stage SQUID amplifier and has a noise temperature of 1.1 mK, of which 0.70 mK is due to back-action noise from the SQUID chip. The total noise includes thermal noise from the transducer mass, which has a measured Q of 2.60 X 10^6. The noise temperature exceeds the expected value of 3.5 \mu K by a factor of 200, primarily due to voltage noise at the input of the SQUID. Noise from flux trapped on the chip is found to be the most likely cause. Comment: Accepted by Applied Physics Letters tentatively scheduled for March 13, 2000 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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