35-LAMBDA 2-STAGE SQUID SYSTEM FOR GRAVITY-WAVE DETECTION

Authors
JIN I AMAR A STEVENSON TR WELLSTOOD FC MORSE A JOHNSON WW
Citation
I. Jin et al., 35-LAMBDA 2-STAGE SQUID SYSTEM FOR GRAVITY-WAVE DETECTION, IEEE transactions on applied superconductivity, 7(2), 1997, pp. 2742-2746
Citations number
20
Categorie Soggetti
Engineering, Eletrical & Electronic","Physics, Applied
Journal title
IEEE transactions on applied superconductivity → ACNP
ISSN journal
10518223
Volume
7
Issue
2
Year of publication
1997
Part
3
Pages
2742 - 2746
Database
ISI
SICI code
1051-8223(1997)7:2<2742:32SSFG>2.0.ZU;2-H
Abstract
We have designed, built and tested a two-stage SQUID measuring system which is primarily intended for use in a 50 mK omnidirectional gravity wave detection system. We fabricated 3 Nb-Al/AlOx-Nb trilayes SQUIDs on a single chip: there is one sensor SQUID and two readout SQUIDs whi ch amplify the output of the sensor SQUID, At a temperature of 90 mK, we measured an intrinsic energy sensitivity of the sensor SQUID of eps ilon(v)=S Phi/(2L)=35h at 1 kHz, of which 24h is white noise and 11h i s 1/f noise.