SQUID Developments for the Gravitational Wave Antenna MiniGRAIL

Author

Pleikies, J.. ; Usenko, O. ; Kuit, K.H. ; Flokstra, J. ; de Waard, A.. ; Frossati, G.

Author_Institution

Univ. of Twente

Volume

17

Issue

2

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

764

Lastpage

767

Abstract

We designed two different sensor SQUIDs for the readout of the resonant mass gravitational wave detector MiniGRAIL. Both designs have integrated input inductors in the order of 1.5 muH and are planned for operation in the mK temperature range. Cooling fins were added to the shunt resistors. The fabricated SQUIDs show a behavior that differs from standard DC-SQUIDs. We were able to operate a design with a parallel configuration of washers at reasonable sensitivities. The flux noise saturated to a value of 0.84 muPhi₀/radicHz below a temperature of 200 mK. The equivalent noise referred to the current through the input coil is 155 fA/radicHz and the energy resolution yields 62 h.

Keywords

SQUIDs; gravitational wave detectors; readout electronics; sensors; SQUID sensor; cooling fins; energy resolution; flux noise; gravitational wave antenna; integrated input inductors; parallel washer configuration; readout system; resonant mass gravitational wave detector; shunt resistors; temperature 200 mK; Coils; Cooling; Detectors; Inductors; Resistors; Resonance; SQUIDs; Shunt (electrical); Temperature distribution; Temperature sensors; Gravitational wave antenna; SQUIDs; superconducting devices;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2007.898067

Filename

4277664