Results 11 to 20 of about 3,275 (185)

High Sensitivity Optically Pumped Quantum Magnetometer [PDF]

The Scientific World Journal, 2013
Quantum magnetometers based on optical pumping can achieve sensitivity as high as what SQUID-based devices can attain. In this paper, we discuss the principle of operation and the optimal design of an optically pumped quantum magnetometer.
Valentina Tiporlini, Kamal Alameh
doaj   +4 more sources

Wireless optically pumped magnetometer MEG

NeuroImage
The current magnetoencephalography (MEG) systems, which rely on cables for control and signal transmission, do not fully realize the potential of wearable optically pumped magnetometers (OPM). This study presents a significant advancement in wireless OPM-
Hao Cheng, Kaiyan He, Congcong Li, Xiao Ma, Fufu Zheng, Wei Xu, Pan Liao, Rui Yang, Dongxu Li, Lang Qin, Shuai Na, Bingjiang Lyu, Jia-Hong Gao   +12 more
doaj   +3 more sources

Drug Monitoring by Optically Pumped Atomic Magnetometer

IEEE Photonics Journal, 2022
A novel drug monitoring method is experimentally demonstrated by optically pumped atomic magnetometer. An elliptically polarized single-beam spin-exchange-relaxation-free atomic magnetometer (SERF AM) is used to realize magnetorelaxometry (MRX ...
Yi Ruan, Xiang He, Limeng Ruan, Fan Liu, Zhiwen Zhang, Jiaqi Weng, Qinying Yan, Guoyi Zhang, Kan Li, Wenqiang Zheng, Qiang Lin   +10 more
doaj   +2 more sources

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, Mojtaba Servatkhah, Mohammad Javad Salehi   +2 more
doaj   +1 more source

The effect of sensor-to-source distance on magnetic neuromuscular signals [PDF]

Scientific Reports
Magnetomyography (MMG) can be used as a contactless modality to study the neuromuscular system. On the one hand, being contactless is a practical advantage as there is no need to prepare skin or attach electrodes as in electromyography (EMG).
Haodi Yang, Thomas Klotz, Leonardo Gizzi, Hongyu Lu, Gianpiero Monittola, Urs Schneider, Markus Siegel, Justus Marquetand   +7 more
doaj   +2 more sources

Floquet description of optically pumped magnetometers [PDF]

Physical Review A, 2021
We present theoretical description of Voigt and Faraday effect based optically pumped magnetometers using the Floquet expansion. Our analysis describes the spin-operator dynamics of the first, $\hat{F}(t)$, and second, $\hat{F}^2(t)$, order moments and takes into account of different pumping profiles and decoherence effects.
Hans Marin Florez, Tadas Pyragius
openaire   +2 more sources

Peripheral Nerve Magnetoneurography with Optically Pumped Magnetometers [PDF]

Frontiers in Physiology, 2021
AbstractElectrodiagnosis is routinely integrated into clinical neurophysiology practice for peripheral nerve disease diagnoses such as neuropathy, demyelinating disorders, nerve entrapment/impingement, plexopathy or radiculopathy. Measured with conventional surface electrodes, the propagation of peripheral nerve action potentials along a nerve is the ...
Yifeng Bu, Jacob Prince, Hamed Mojtahed, Donald Kimball, Vishal Shah, Todd Coleman, Mahasweta Sarkar, Ramesh Rao, Mingxiong Huang, Peter Schwindt, Amir Borna, Imanuel Lerman, Imanuel Lerman, Imanuel Lerman   +13 more
openaire   +5 more sources

Muscle fatigue revisited - Insights from optically pumped magnetometers [PDF]

Frontiers in Physiology, 2021
AbstractMuscle fatigue is well characterized electromyographically, nevertheless only information about summed potential differences is detectable. In contrast, recently developed quantum sensors optically pumped magnetometers (OPMs) offer the advantage of recording both the electrical current propagation in the muscle as well as its geometry, by ...
Davide Sometti, Davide Sometti, Davide Sometti, Davide Sometti, Lorenzo Semeia, Lorenzo Semeia, Sangyeob Baek, Sangyeob Baek, Hui Chen, Hui Chen, Giulia Righetti, Giulia Righetti, Giulia Righetti, Giulia Righetti, Juergen Dax, Juergen Dax, Cornelius Kronlage, Milena Kirchgässner, Alyssa Romano, Johanna Heilos, Deborah Staber, Julia Oppold, Thomas Middelmann, Christoph Braun, Christoph Braun, Christoph Braun, Christoph Braun, Philip Broser, Justus Marquetand, Justus Marquetand, Justus Marquetand   +30 more
openaire   +6 more sources

Optically Pumped Magnetometer Measuring Fatigue-Induced Damage in Steel

Applied Sciences, 2022
Uniaxial fatigue testing of micro-mechanical metallic specimens can provide valuable insight into damage formation. Magnetic and piezomagnetic testing are commonly used for qualitative characterization of damage in ferromagnetic specimens.
Peter A. Koss, Ali Riza Durmaz, Andreas Blug, Gennadii Laskin, Omkar Satish Pawar, Kerstin Thiemann, Alexander Bertz, Thomas Straub, Christian Elsässer   +8 more
doaj   +1 more source

Adaptive multipole models of optically pumped magnetometer data. [PDF]

Hum Brain Mapp
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
Tierney TM, Seedat Z, St Pier K, Mellor S, Barnes GR.   +4 more
europepmc   +4 more sources