Magnetic shielding of long paraboloid structures in the inhomogeneous magnetic field

J Kvitkovic, K Burnside, M Zhang, S Pamidi

Research output: Contribution to journalConference article

Abstract

Shielding efficacy of the high-Temperature superconducting (HTS) magnetic shields depends on the superconductor properties and on the orientation of the external magnetic field. For precise magnetic field measurements in areas with changing direction of magnetic noise it is important to reduce both the parallel and perpendicular components of the magnetic field. We have designed and fabricated magnetic shields of 25 cm long paraboloid shape with closed sides from second-generation HTS tapes. We have characterized HTS shields in DC and variable frequency AC magnetic fields at 77 K above a copper electromagnet acting as the source of inhomogeneous magnetic noise. The HTS magnetic shields reduce the magnetic field noise penetration and enhance the sensitivity of magnetic field sensors. The measurements were performed with the magnetic shield placed between the noise source and the sensor. 2D finite element analysis using Comsol model was generated and the results were compared with the experimental data of magnetic field dependences of the shielding factor (SF).

Original languageEnglish
Article number012117
Number of pages9
JournalJournal of Physics: Conference Series
Volume1559
Issue number1
DOIs
Publication statusPublished - 19 Jun 2020
Event14th European Conference on Applied Superconductivity, EUCAS 2019 - Glasgow, United Kingdom
Duration: 1 Sep 20195 Sep 2019

Keywords

  • high temperature superconducting (HTS)
  • magnetic shielding
  • magnetic screens

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