Results 1 to 10 of about 3,346 (191)

Stray Magnetic Field Compensation with a Scalar Atomic Magnetometer

, 2010
We describe a system for the compensation of time-dependent stray magnetic fields using a dual channel scalar magnetometer based on non-linear Faraday rotation in synchronously optically pumped Cs vapour.
Belfi, Jacopo, Bevilacqua, Giuseppe, Biancalana, Valerio, Cecchi, Roberto, Dancheva, Yordanka, Moi, Luigi   +5 more
core   +1 more source

Wavelength Locking of Vertical-Cavity Surface-Emitting Laser in Optically Pumped Magnetometer

Shanghai Jiaotong Daxue xuebao
Aimed at the requirements of optically pumped magnetometer (OPM) for miniaturization, low power consumption and laser frequency stability, a wavelength locking control scheme for vertical-cavity surface-emitting laser is proposed.
LUO Manruo, LI Shaoliang, HUANG Yiming, ZHANG Chi, WU Zhaocai, LIU Hua
doaj   +1 more source

A modular optically pumped magnetometer system

Quantum Science and Technology
Abstract To address the demands in healthcare and industrial settings for spatially resolved magnetic imaging, we present a modular optically pumped magnetometer (OPM) system comprising a multi-sensor array of highly sensitive quantum magnetometers.
T Coussens, A Gialopsou, C Abel, M G Bason, T M James, W Evans, M T M Woodley, D Nightingale, D Nicolau, L Page, F Oručević, P Krüger   +11 more
openaire   +2 more sources

Compensation System for Biomagnetic Measurements with Optically Pumped Magnetometers inside a Magnetically Shielded Room

Sensors, 2020
Magnetography with superconducting quantum interference device (SQUID) sensor arrays is a well-established technique for measuring subtle magnetic fields generated by physiological phenomena in the human body.
Anna Jodko-Władzińska, Krzysztof Wildner, Tadeusz Pałko, Michał Władziński   +3 more
doaj   +1 more source

Restoring Narrow Linewidth to a Gradient-Broadened Magnetic Resonance by Inhomogeneous Dressing

, 2019
We study the possibility of counteracting the line-broadening of atomic magnetic resonances due to inhomogeneities of the static magnetic field by means of spatially dependent magnetic dressing, driven by an alternating field that oscillates much faster ...
Bevilacqua, Giuseppe, Biancalana, Valerio, Dancheva, Yordanka, Vigilante, Antonio   +3 more
core   +1 more source

Magnetoencephalography measurement of somatosensory responses in optogenetic rats using optically pumped magnetometer [PDF]

AIP Advances
The aim of this study was to evaluate the effectiveness of optical stimulation in optogenetically modified rats for magnetoencephalographic (MEG) measurements in small animals.
Kanta Komuro, Motofumi Fushimi, Yuta Kainuma, Tingyu Zhu, Seiko Funatani, Shinichi Chikaki, Hiroshi Tomita, Hiromu Yawo, Masaki Sekino   +8 more
doaj   +1 more source

Magnetic imaging with an ensemble of Nitrogen Vacancy centers in diamond

, 2015
The nitrogen-vacancy (NV) color center in diamond is an atom-like system in the solid-state which specific spin properties can be efficiently used as a sensitive magnetic sensor.
Achard, J., Chipaux, M., Debuisschert, T., Jacques, V., Meijer, J., Pezzagna, S., Roch, J. -F., Tallaire, A.   +7 more
core   +2 more sources

Towards Multi-Class Optically Pumped Magnetometer-Based Brain-Computer Interfaces

Current Directions in Biomedical Engineering
Magnetoencephalography (MEG) using optically pumped magnetometers (OPMs) offers several advantages over electroencephalography (EEG) and superconducting quantum interference device (SQUID)-based MEG, including improved spatial resolution and versatility.
Zerfowski Jan, Wimpff Martin, Anders Paul, Peekhaus Niels, Jonany Vincent, Soekadar Surjo R.   +5 more
doaj   +1 more source

A highly stable atomic vector magnetometer based on free spin precession

, 2015
We present a magnetometer based on optically pumped Cs atoms that measures the magnitude and direction of a 1 $\mu$T magnetic field. Multiple circularly polarized laser beams were used to probe the free spin precession of the Cs atoms.
Afach, S., Ban, G., Bison, G., Bodek, K., Chowdhuri, Z., Grujic, Z. D., Hayen, L., Helaine, V., Kasprzak, M., Kirch, K., Knowles, P., Koch, H. -C., Komposch, S., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemiere, Y., Mtchedlishvili, A., Naviliat-Cuncic, O., Piegsa, F. M., Prashanth, P. N., Quemener, G., Rawlik, M., Ries, D., Roccia, S., Rozpedzik, D., Schmidt-Wellenburg, P., Severjins, N., Weis, A., Wursten, E., Wyszynski, G., Zejma, J., Zsigmond, G.   +33 more
core   +3 more sources

Microfabricated Optically-Pumped Magnetometers for Biomagnetic Applications

Journal of Physics: Conference Series, 2016
We report on the progress in developing microfabricated optically-pumped magnetometer arrays for imaging applications. We have improved our sensitivities by several orders of magnitude in the last ten years. Now, our zero-field magnetometers reach noise values below 15 fT/Hz1/2.
Svenja Knappe, Orang Alem, Dong Sheng, John Kitching   +3 more
openaire   +1 more source