Analytical optimization of low-frequency search coil magnetometers

Asaf Grosz, Eugene Paperno

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


An analytical optimization is proposed for the sensitivity threshold of low-frequency search coil magnetometers employing disk-shape flux concentrators. The optimal diameters of the core and the wire are found for a given set of the optimization parameters: frequency, search coil volume and aspect ratio, relative permeability of the core and the flux concentrators, and the noise of the preamplifier. The proposed analytical optimization allows an immediate analysis of the theoretical limits of the magnetometer sensitivity threshold. An approximation is obtained to simplify and clarify the relationship between the minimum possible sensitivity threshold and the optimization parameters. Measurements performed with an experimental magnetometer model confirm the optimization.

Original languageEnglish
Article number6210352
Pages (from-to)2719-2723
Number of pages5
JournalIEEE Sensors Journal
Issue number8
StatePublished - 25 Jun 2012


  • Analytical optimization
  • disk-shape flux concentrators
  • low frequency
  • preamplifier noise
  • search coil magnetometers
  • sensitivity threshold

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering


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