| Numéro |
J. Phys. IV France
Volume 08, Numéro PR3, June 1998
Proceedings of the 3rd European Workshop on Low Temperature ElectronicsWOLTE 3 |
|
|---|---|---|
| Page(s) | Pr3-229 - Pr3-232 | |
| DOI | https://doi.org/10.1051/jp4:1998350 | |
Proceedings of the 3rd European Workshop on Low Temperature Electronics
WOLTE 3
J. Phys. IV France 08 (1998) Pr3-229-Pr3-232
DOI: 10.1051/jp4:1998350
Low Temperature Division, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
© EDP Sciences 1998
WOLTE 3
J. Phys. IV France 08 (1998) Pr3-229-Pr3-232
DOI: 10.1051/jp4:1998350
Towards practical quantum-limited SQUlDs for a gravitational wave antenna
J. Flokstra, E. Bartolomé, M.J. Van Duuren, G.C.S. Brons, D. Veldhuis and H. RogallaLow Temperature Division, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
Abstract
Nearly quantum-limited Superconducting QUantum Interference Devices (SQUIDs) have to be used in resonant mass gravitational wave antennas to reach a displacement sensitivity of the order of 10-21 nV/√Hz in a bandwidth of 100 Hz around the resonance frequency of about 900 Hz. The design of these dc SQUIDs will be described. The possible use of Double Relaxation Oscillation SQUIDs (DROSs) was also studied. We show that SQUIDs with a relatively large hole size can reach the quantum limit at low temperatures. The large hole size facilitates the coupling between the SQUID and the inductive transformer circuit of the antenna.
© EDP Sciences 1998