Results 111 to 120 of about 2,930 (181)

A project for a new alkali vapour magnetometer, optically pumped by a diode laser

Annals of Geophysics, 1998
We present here a project for the industrial development of a new magnetometer that is intended to achieve the highest performance in measuring geomagnetic field.
A. Donati, E. Simeone, M. Francesconi, E. Maccioni, E. Alzetta, C. Carmisciano, O. Faggioni, N. Beverini, F. Strumia   +8 more
doaj   +1 more source

Adaptive multipole models of optically pumped magnetometer data

Human Brain Mapping
AbstractMultipole expansions have been used extensively in the Magnetoencephalography (MEG) literature for mitigating environmental interference and modelling brain signal. However, their application to Optically Pumped Magnetometer (OPM) data is challenging due to the wide variety of existing OPM sensor and array designs. We therefore explore how such
Tim M. Tierney, Zelekha Seedat, Kelly St Pier, Stephanie Mellor, Gareth R. Barnes   +4 more
openaire   +3 more sources

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

Noise Reduction and Localization Accuracy in a Mobile Magnetoencephalography System

Sensors
Magnetoencephalography (MEG) non-invasively provides important information about human brain electrophysiology. The growing use of optically pumped magnetometers (OPM) for MEG, as opposed to fixed arrays of cryogenic sensors, has opened the door for ...
Timothy Bardouille, Vanessa Smith, Elias Vajda, Carson Drake Leslie, Niall Holmes   +4 more
doaj   +1 more source

Study of ³He Rabi nutations by optically-pumped cesium magnetometers [PDF]

, 2017
We describe a method for recording the Rabi nutation of nuclear spin polarized ³He by optically pumped cesium magnetometers. The measurement is performed by detecting the time-dependent magnetic field produced by the 3He magnetization.
Bison, Georg, Grujiæ, Zoran Dragan, Heil, Werner, Kasprzak, Malgorzata, Knowles, Paul, Koch, Hans-Christian, Kraft, Andreas, Pazgalev, Anatoly, Schnabel, Allard, Voigt, Jens, Weis, Antoine   +10 more
core  

A large-scale magnetic shield with 10^6 damping at mHz frequencies

, 2015
We present a magnetically shielded environment with a damping factor larger than one million at the mHz frequency regime and an extremely low field and gradient over an extended volume.
Altarev, I., Bales, M., Beck, D. H., Chupp, T., Fierlinger, K., Fierlinger, P., Kuchler, F., Lins, T., Marino, M. G., Niessen, B., Petzoldt, G., Schläpfer, U., Schnabel, A., Singh, J. T., Stoepler, R., Strum, M., Stuiber, S., Taubenheim, B., Voigt, J.   +18 more
core   +1 more source

Superconducting Quantum Magnetometers for Brain Investigations

Sensors
This review article aims to provide an overview of superconducting magnetic quantum sensors and their applications in the biomedical field, particularly in the neurological field.
Carmela Bonavolontà, Antonio Vettoliere, Pierpaolo Sorrentino, Carmine Granata   +3 more
doaj   +1 more source

Modeling and Measuring of Light Shift in Optically Pumped Atomic Magnetometers

IEEE Photonics Journal
The light shift is a significant error source of optically pumped atomic magnetometers (OPAMs), requiring accurate calculation or measurement to assess its impact on the accuracy of OPAMs.
Yuntian Zou, Xiangyang Zhou, Jiali Liu, Chi Fang, Jinghong Xu, Wei Quan, Liwei Jiang   +6 more
doaj   +1 more source

Femtotesla atomic magnetometry in a microfabricated vapor cell [PDF]

, 2010
Allred, Budker, Dang, Drung, Dupont-Roc, Griffith, Happer, John Kitching, Knappe, Knappe, Knappe, Kominis, Kornack, Ledbetter, Ledbetter, Lee, Robbes, Shah, Sternickel, Svenja Knappe, W. Clark Griffith, Wallis   +21 more
core   +1 more source

An Improved Neutron Electric Dipole Moment Experiment

, 2008
A new measurement of the neutron EDM, using Ramsey's method of separated oscillatory fields, is in preparation at the new high intensity source of ultra-cold neutrons (UCN) at the Paul Scherrer Institute, Villigen, Switzerland (PSI).
Altarev, I., Ban, G., Bison, G., Bodek, K., Burghoff, M., Daum, M., Eberhardt, K., Fierlinger, P., Gutsmiedl, E., Hampel, G., Heil, W., Henneck, R., Khomutov, N., Kirch, K., Kistryn, St., Knappe-Grueneberg, S., Knecht, A., Knowles, P., Kratz, J. V., Kuźniak, M., Lauer, T., Lauss, B., Lefort, T., Mtchedlishvili, A., Naviliat-Cuncic, O., Paul, S., Pazgalev, A. S., Petzold, G., Plonka-Spehr, C., Quéméner, G., Rebreyend, D., Roccia, S., Rogel, G., Sander-Thoemmes, T., Schnabel, A., Severijns, N., Sobolev, Yu., Stoepler, R., Trahms, L., Tur, M., Weis, A., Wiehl, N., Zejma, J., Zsigmond, G.   +43 more
core   +1 more source