Distributed network of optically pumped magnetometers for space weather monitoring [PDF]
Scientific ReportsSpatial variation in the intensity of magnetospheric and ionospheric fluctuations during solar storms creates ground-induced currents, of importance in both infrastructure engineering and geophysical science.
Marcin S. Mrozowski +8 more
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Noninvasive Magnetic-Marking-Based Flow Metering with Optically Pumped Magnetometers
Applied Sciences, 2022 We present a noninvasive procedure that measures the flow velocity of a fluid by using polarized hydrogen nuclei in the fluid. The measurement procedure is based on a time-of-flight method where magnetic information is applied on the fluid with a ...
Leonhard Schmieder +3 more
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Optically pumped magnetometers detect altered maximal muscle activity in neuromuscular disease [PDF]
Frontiers in Neuroscience, 2022 Optically pumped magnetometers (OPM) are quantum sensors that enable the contactless, non-invasive measurement of biomagnetic muscle signals, i.e., magnetomyography (MMG).
Lorenzo Semeia +27 more
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Contactless measurements of retinal activity using optically pumped magnetometers [PDF]
NeuroImage, 2021 Optically pumped magnetometers (OPMs) have been adopted for the measurement of brain activity. Without the need to be cooled to cryogenic temperatures, an array of these sensors can be placed more flexibly, which allows for the recording of neuronal ...
Britta U. Westner +4 more
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Bias Calibration of Optically Pumped Magnetometers Based on Variable Sensitivity [PDF]
SensorsOptically pumped magnetometers (OPMs) functioning in the spin-exchange relaxation-free (SERF) regime have emerged as attractive options for measuring weak magnetic fields, owing to their portability and remarkable sensitivity.
Jieya Chen +4 more
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Multi-Parameter Optimization of Rubidium Laser Optically Pumped Magnetometers with Geomagnetic Field Intensity [PDF]
Sensors, 2023 Rubidium laser optically pumped magnetometers (OPMs) are widely used magnetic sensors based on the Zeeman effect, laser pumping, and magnetic resonance principles. They measure the magnetic field by measuring the magnetic resonance signal passing through
Kun Xu +9 more
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A customized bed based stand alone array of optically pumped magnetometers for fetal magnetocardiography measurements [PDF]
Scientific ReportsFetal magnetocardiography (fMCG) is a non-invasive technique that measures the magnetic fields associated with fetal heart electrical activity outside of the maternal abdomen.
Diana Escalona-Vargas +4 more
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Detection of the 40 Hz auditory steady-state response with optically pumped magnetometers [PDF]
Scientific Reports, 2022 Magnetoencephalography (MEG) is a functional neuroimaging technique that noninvasively detects the brain magnetic field from neuronal activations. Conventional MEG measures brain signals using superconducting quantum interference devices (SQUIDs).
Kyung-min An +11 more
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Non-invasive measurements of ictal and interictal epileptiform activity using optically pumped magnetometers [PDF]
Scientific Reports, 2023 Magneto- and electroencephalography (MEG/EEG) are important techniques for the diagnosis and pre-surgical evaluation of epilepsy. Yet, in current cryogen-based MEG systems the sensors are offset from the scalp, which limits the signal-to-noise ratio (SNR)
Arjan Hillebrand +11 more
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High Sample Rate Optically Pumped Helium Magnetometer [PDF]
Journal of Optoelectronical Nanostructures, 2019 Optically pumped helium magnetometers are important instruments whichhave many applications in military, mass spectroscopy and space applications. In thispaper, the working principles of helium magnetometers have been explained.
Abdorreza Asrar +2 more
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