Noise measurements and optimization of the high sensitivity capacitive transducer of AURIGA
- 19 March 2002
- journal article
- Published by IOP Publishing in Classical and Quantum Gravity
- Vol. 19 (7) , 1991-1996
- https://doi.org/10.1088/0264-9381/19/7/404
Abstract
Tests of the new AURIGA readout have recently started in the AURIGA ultracryogenic test facility. The most important modifications, with respect to the previous version of the readout, are a new, heavier, resonant capacitive transducer, the tuning of the electrical mode to the two mechanical ones and the use of a low noise two-stage SQUID amplifier. Results regarding the quality factor and the noise of the transducer mechanical and electrical modes are presented.Keywords
This publication has 12 references indexed in Scilit:
- Status report and near future prospects for the gravitational wave detector AURIGAClassical and Quantum Gravity, 2002
- A 200 ℏ two-stage dc SQUID amplifier for resonant gravitational wave detectorsClassical and Quantum Gravity, 2002
- Characterization of the Input Noise Sources of a dc SQUIDJournal of Low Temperature Physics, 2001
- Thermal noise in a high Q cryogenic resonatorReview of Scientific Instruments, 1999
- Back action of a low noise dc SQUIDApplied Physics Letters, 1998
- Measurement of the dynamic input impedance of a dc superconducting quantum interference device at audio frequenciesApplied Physics Letters, 1997
- A high inductance kHz resonator with a quality factor larger than 106Review of Scientific Instruments, 1994
- Optimal design of resonant-mass gravitational wave antennasPhysical Review D, 1987
- Signal and noise theory for a dc SQUID amplifierJournal of Low Temperature Physics, 1985
- Development and test atT=4.2K of a capacitive resonant transducer for cryogenic gravitational-wave antennasIl Nuovo Cimento C, 1982