Results 21 to 30 of about 699 (162)
How to build a magnetometer with thermal atomic vapor: a tutorial
New Journal of Physics, 2023 This article is designed as a step-by-step guide to optically pumped magnetometers based on alkali atomic vapor cells. We begin with a general introduction to atomic magneto-optical response, as well as expected magnetometer performance merits and how ...
Anne Fabricant +2 more
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Pulsed operation of a miniature scalar optically pumped magnetometer. [PDF]
J Opt Soc Am B, 2017 A scalar magnetic field sensor based on a millimeter-size 87Rb vapor cell is described. The magnetometer uses nearly copropagating pump and probe laser beams, amplitude modulation of the pump beam, and detection through monitoring the polarization rotation of the detuned probe beam.
Gerginov V, Krzyzewski S, Knappe S.
europepmc +4 more sources
Vector magnetocardiography using compact optically-pumped magnetometers
Heliyon, 2023 Optically pumped magnetometers can provide functionality for bio-magnetic field detection and mapping. This has attracted widespread attention from researchers in the biomedical science field. Magnetocardiography has been proven to be an effective method for examining heart disease.
Shengran Su +10 more
openaire +3 more sources
Sensors, 2023 The signal space separation (SSS) method is routinely employed in the analysis of multichannel magnetic field recordings (such as magnetoencephalography (MEG) data).
Niall Holmes +3 more
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Ultra-sensitive Magnetic Microscopy with an Optically Pumped Magnetometer. [PDF]
Sci Rep, 2016 AbstractOptically pumped magnetometers (OPMs) based on lasers and alkali-metal vapor cells are currently the most sensitive non-cryogenic magnetic field sensors. Many applications in neuroscience and other fields require high-resolution, high-sensitivity magnetic microscopic measurements. In order to meet this demand we combined a cm-size spin-exchange
Kim YJ, Savukov I.
europepmc +4 more sources
Moving Wearable Magnetoencephalography Measurement Study Based on Optically-pumped Magnetometer
Chinese Journal of Magnetic Resonance, 2022 Magnetoencephalography is a non-invasive technology for brain function imaging, which is of enormous value to brain science research and clinical application due to its ultra-high temporal and spatial trace resolution.
Chun-qiao CHEN +7 more
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Four-channel optically pumped magnetometer for a magnetoencephalography sensor array. [PDF]
Opt ExpressWe present a novel four-channel optically pumped magnetometer (OPM) for magnetoencephalography that utilizes a two-color pump/probe scheme on a single optical axis. We characterize its performance across 18 built sensor modules. The new sensor implements several improvements over our previously developed sensor including lower vapor-cell operating ...
Iivanainen J +8 more
europepmc +5 more sources
Adaptive multipole models of optically pumped magnetometer data. [PDF]
Hum Brain MappAbstractMultipole 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
Tierney TM +4 more
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AIP Advances, 2020 The optical light shift effect is an all-optical technique to create magnetic bias fields to determine the vector components of the magnetic field using a scalar optically pumped magnetometer.
Janet W. Lou, Geoffrey A. Cranch
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Biomagnetism: The First Sixty Years
Sensors, 2023 Biomagnetism is the measurement of the weak magnetic fields produced by nerves and muscle. The magnetic field of the heart—the magnetocardiogram (MCG)—is the largest biomagnetic signal generated by the body and was the first measured.
Bradley J. Roth
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