SQUID amplifier system for vibrating wire resonators

Authors
Martikainen, J Tuoriniemi, JT
Citation
J. Martikainen et Jt. Tuoriniemi, SQUID amplifier system for vibrating wire resonators, J L TEMP PH, 124(1-2), 2001, pp. 367-382
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF LOW TEMPERATURE PHYSICS
ISSN journal
00222291 → ACNP
Volume
124
Issue
1-2
Year of publication
2001
Pages
367 - 382
Database
ISI
SICI code
0022-2291(200107)124:1-2<367:SASFVW>2.0.ZU;2-O
Abstract
We describe a simple coupling scheme of superconducting vibrating wire reso nators to a SQUID amplifier for achieving supreme signal to noise character istics. Our construction resulted in a gain factor near 10(8)phi (0)/V at I kHz with an amplifier noise level of about 20 mu phi (0)/root Hz. Extremel y small movements of the wires in very small magnetic fields can thus be de tected.