Elimination of 1/ƒ Noise in Gradiometers for SQUID-Based Ultra-Low Field Nuclear Magnetic Resonance

@article{Matlashov2015EliminationO1,
  title={Elimination of 1/ƒ Noise in Gradiometers for SQUID-Based Ultra-Low Field Nuclear Magnetic Resonance},
  author={Andrei N. Matlashov and Per E. Magnelind and Peter Volegov and Michelle A. Espy},
  journal={2015 15th International Superconductive Electronics Conference (ISEC)},
  year={2015},
  pages={1-3}
}
Superconducting wire may trap magnetic flux after being exposed to strong magnetic fields, for example when used as gradiometer material in a SQUID-based ultra-low field nuclear magnetic resonance system. In this work we investigated noise caused by the dynamics of trapped flux in superconducting gradiometers made from different materials. Niobium (Nb), niobium-titanium (NbTi), and tantalum (Ta) wires were tested. Small wire-wound gradiometers were connected to a SQUID sensor. Nb and NbTi wires… CONTINUE READING

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