Comparison of noise reduction techniques in RF SQUID magnetic detection systems

Author

Jahed, Navid M S ; Sarreshtedari, Farrokh ; Forooghi, Farshad ; Fardmanesh, Mehdi ; Schubert, Jurgen ; Banzet, Marko

Author_Institution

Dept. of Electr. Eng., Sharif Univ. of Technol., Tehran, Iran

fYear

2010

fDate

11-13 May 2010

Firstpage

446

Lastpage

449

Abstract

The noise level of the magnetometer and gradiometer RF SQUIDs were investigated using different shielding methods. The used methods include different active and passive shielding, such as Helmholtz configurations, locally compensation coils, superconducting bulks and μ-metal shields. For the passive shielding approach, using FEM simulation we have investigated the shielding effectiveness of superconducting bulks versus the use of μ-metal shielding. The superconducting shield is a YBCO circular bulk, which was made using melt-texture method and located in a distance in front of the SQUID. In this work the results of these shielding methods are presented and compared, while their effectiveness is discussed by measuring the noise spectrum of the SQUIDs in each configuration.

Keywords

Magnetic shielding; Noise level; Noise measurement; Noise reduction; Radio frequency; SQUID magnetometers; Superconducting coils; Superconducting device noise; Superconducting magnets; Yttrium barium copper oxide; Active shielding; Noise reduction; SQUID; component; superconductor bulk;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Engineering (ICEE), 2010 18th Iranian Conference on

Conference_Location

Isfahan, Iran

Print_ISBN

978-1-4244-6760-0

Type

conf

DOI

10.1109/IRANIANCEE.2010.5507029

Filename

5507029