Stray magnetic field compensation with a scalar atomic magnetometer

Belfi, J.; Bevilacqua, G.; Biancalana, V.; Cecchi, R.; Dancheva, Y.; Moi, L.
June 2010
Review of Scientific Instruments;Jun2010, Vol. 81 Issue 6, p065103
Academic Journal
We describe a system for the compensation of time-dependent stray magnetic fields using a dual channel scalar magnetometer based on nonlinear Faraday rotation in synchronously optically pumped Cs vapor. We detail the active control strategy, with an emphasis on the electronic circuitry, based on a simple phase-locked-loop integrated circuit. The performance and limits of the system developed are tested and discussed. The system was applied to significantly improve the detection of free induction decay signals from protons of remotely magnetized water precessing in an ultralow magnetic field.


Related Articles

  • Stray-field-induced modification of coherent spin dynamics. Meier, L.; Salis, G.; Ellenberger, C.; Gini, E.; Ensslin, K. // AIP Conference Proceedings;2007, Vol. 893 Issue 1, p1365 

    Electron spins in an InGaAs semiconductor quantum well are used as a magnetometer of magnetic stray fields from an array of Fe bars. Using time-resolved Faraday rotation, the coherent precession of quantum-well spins in the inhomogeneous field between the Fe bars is measured for varying external...

  • The stellar-disk electric (short) circuit: observational predictions for a YSO jet flow. Liffman, Kurt // Astrophysics & Space Science;Sep2007, Vol. 311 Issue 1-3, p69 

    We discuss the star-disk electric circuit for a young stellar object (YSO) and calculate the expected torques on the star and the disk. We obtain the same disk magnetic field and star-disk torques as given by standard magnetohydrodynamic (MHD) analysis. We show how a short circuit in the...

  • Design and Performance of Laser-Pumped Cs-Magnetometers for the Planned UCN EDM Experiment at PSI. Groeger, S.; Bison, G.; Weis, A. // Journal of Research of the National Institute of Standards & Tec;May/Jun2005, Vol. 110 Issue 3, p179 

    We designed laser-pumped cesium vapor magnetometers in the Mx configuration for the control and stabilization of magnetic field fluctuations and gradients in a new experiment searching for a permanent electric dipole moment of the neutron. The intrinsic sensitivity of the device was determined...

  • Gradiometric investigation of a cesium-vapor quantum magnetometer. Aleksandrov, E. B.; Balabas, M. V.; Dmitriev, S. P.; Dovator, N. A.; Ivanov, A. I.; Krasnoshchekova, I. A.; Kulyasov, V. N.; Marchenkov, V. V.; Pazgalev, A. S.; Serebrov, A. P.; Soloveĭ, V. A.; Shmelev, G. E. // Technical Physics;Mar2007, Vol. 52 Issue 3, p389 

    Experiments aimed to determine the sensitivity and the optical shift of the output frequency of a magnetometer based on optical pumping of cesium atoms and intended for a neutron magnetic resonance stabilization system are described. A gradiometric arrangement used in these experiments makes it...

  • Electrical circuit modeling of reversed field pinches. Sprott, J. C. // Physics of Fluids (00319171);Aug88, Vol. 31 Issue 8, p2266 

    Equations are proposed to describe the radial variation of the magnetic field and current density in a circular, cylindrical reversed field pinch (RFP). These equations are used to derive the electrical circuit parameters (inductance, resistance, and coupling coefficient) for a RFP discharge....

  • Diseño y construcción de un teslámetro digital embebido para la caracterización magnética de materiales. Velásquez, A. A.; Rodríguez, Juliana Baena; Gutiérrez Loaiza, Yhefferson Fernando // Ingeniería y Ciencia;ene-jun2015, Vol. 11 Issue 21, p99 

    We present the design, construction and validation of an embedded digital teslameter, intended for use in experiments of magnetic materials characterization by inductive and static methods. The teslameter consists of a planar type Hall effect transducer THS119, with differential output and...

  • Torque magnetometry in pulsed magnetic fields with use of a commercial microcantilever. Ohmichi, E.; Osada, T. // Review of Scientific Instruments;Aug2002, Vol. 73 Issue 8, p3022 

    A miniature torquemeter for use in a pulsed magnetic field is developed by utilizing a commercially available piezoresistive microcantilever. The high sensitivity of ∼5 × 10[sup -13] Am² at 38 T is achieved. The response to faster signals were considerably improved due to high...

  • Low noise operation of integrated YBa[sub 2]Cu[sub 3]O[sub 7] magnetometers in static magnetic fields. Krey, S.; David, B.; Eckart, R.; Do¨ssel, O. // Applied Physics Letters;6/15/1998, Vol. 72 Issue 24 

    The noise of two integrated YBa[sub 2]Cu[sub 3]O[sub 7]-SrTiO[sub 3]-YBa[sub 2]Cu[sub 3]O[sub 7] multilayer magnetometers in static magnetic fields up to 110 μT is investigated: An inductively coupled magnetometer with integrated flux transformer and a multiloop magnetometer. In both samples,...

  • Heart magnet.  // Professional Engineering;2/10/2010, Vol. 23 Issue 2, p40 

    The article reports on the development of a portable magnetometer by researchers at the University of Leeds in England, in which the instrument would measure magnetic fields.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics