Results 51 to 60 of about 2,930 (181)

Active Magnetic-Field Stabilization with Atomic Magnetometer

open access: yesSensors, 2020
A magnetically-quiet environment is important for detecting faint magnetic-field signals or nonmagnetic spin-dependent interactions. Passive magnetic shielding using layers of large magnetic-permeability materials is widely used to reduce the magnetic ...
Rui Zhang   +7 more
doaj   +1 more source

Theory of double resonance magnetometers based on atomic alignment [PDF]

open access: yes, 2006
We present a theoretical study of the spectra produced by optical-radio-frequency double resonance devices, in which resonant linearly polarized light is used in the optical pumping and detection processes. We extend previous work by presenting algebraic
Anatoly S. Pazgalev   +7 more
core   +2 more sources

Non-invasive detection of animal nerve impulses with an atomic magnetometer operating near quantum limited sensitivity [PDF]

open access: yes, 2016
Magnetic fields generated by human and animal organs, such as the heart, brain and nervous system carry information useful for biological and medical purposes.
Balabas, Mikhail V.   +12 more
core   +3 more sources

Optimization and performance of an optical cardio-magnetometer [PDF]

open access: yes, 2004
Cardiomagnetometry is a growing field of noninvasive medical diagnostics that has triggered a need for affordable high-sensitivity magnetometers. Optical pumping magnetometers are promising candidates satisfying that need since it was demonstrated that ...
Alexandrov   +16 more
core   +2 more sources

Multimodal neuroimaging with optically pumped magnetometers: A simultaneous MEG-EEG-fNIRS acquisition system

open access: yesNeuroImage, 2022
Multimodal neuroimaging plays an important role in neuroscience research. Integrated noninvasive neuroimaging modalities, such as magnetoencephalography (MEG), electroencephalography (EEG) and functional near-infrared spectroscopy (fNIRS), allow neural ...
Xingyu Ru   +18 more
doaj   +1 more source

An optically pumped magnetometer working in the light-shift dispersed Mz mode [PDF]

open access: yes, 2017
We present an optically pumped magnetometer working in a new operational mode— the light-shift dispersed Mz (LSD-Mz) mode. It is realized combining various features; (1) high power off-resonant optical pumping; (2) Mz configuration, where pumping light
IJsselsteijn, Rob   +5 more
core   +2 more sources

Optical hyperpolarization and NMR detection of $^{129}$Xe on a microfluidic chip

open access: yes, 2013
Optically hyperpolarized $^{129}$Xe gas has become a powerful contrast agent in nuclear magnetic resonance (NMR) spectroscopy and imaging, with applications ranging from studies of the human lung to the targeted detection of biomolecules.
Bajaj, Vikram S.   +8 more
core   +1 more source

Wireless optically pumped magnetometer MEG

open access: yesNeuroImage
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-MEG by reducing magnetization in the electronics and developing a tailored wireless communication ...
Hao Cheng   +12 more
openaire   +3 more sources

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