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Comparison of noise reduction techniques in RF SQUID magnetic detection systems

Sadeghi Jahed, N. M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/IRANIANCEE.2010.5507029
  3. Abstract:
  4. 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
  5. Keywords:
  6. SQUID ; Superconductor bulk ; Active shielding ; Compensation coil ; FEM simulations ; Gradiometers ; Helmholtz ; Magnetic detection ; Noise levels ; Noise reduction ; Noise reduction technique ; Noise reductions ; Noise spectra ; Passive shielding ; RF SQUID ; Shielding effectiveness ; Superconducting bulks ; Acoustic noise measurement ; Busbars ; Electrical engineering ; Finite element method ; Smelting ; Superconducting materials ; Superconductivity ; Yttrium barium copper oxides ; Shielding
  7. Source: Proceedings - 2010 18th Iranian Conference on Electrical Engineering, ICEE 2010, 11 May 2010 through 13 May 2010 ; 2010 , Pages 446-449 ; 9781424467600 (ISBN)
  8. URL: http://ieeexplore.ieee.org/document/5507029