Results 21 to 30 of about 261 (140)
A 90‐channel triaxial magnetoencephalography system using optically pumped magnetometers
Annals of the New York Academy of Sciences, Volume 1517, Issue 1, Page 107-124, November 2022., 2022 Magnetoencephalography (MEG) measures the tiny magnetic fields generated by current flow in the brain, but conventional MEG is hampered by cumbersome cryogenic field‐sensing technologies. Our wearable, 90‐channel triaxial optically‐pumped magnetometer (OPM) MEG system—in conjunction with precision magnetic field control that reduced background fields ...
Molly Rea +10 more
wiley +1 more source
Evolution of MEG: A first MEG‐feasible fluxgate magnetometer
Human Brain Mapping, Volume 42, Issue 15, Page 4844-4856, October 15, 2021., 2021 In the current article, we present the first solid‐state sensor feasible for magnetoencephalography (MEG) that works at room temperature. The sensor is a fluxgate magnetometer based on yttrium‐iron garnet films (YIGM). In this feasibility study, we prove the concept of using the YIGM in terms of MEG by registering a simple brain‐induced field—the human
Nikolay Koshev +7 more
wiley +1 more source
Photonics, 2023 Inside a spin-exchange relaxation-free (SERF) co-magnetometer with a high-pressure buffer gas atomic cell, the magnetic field gradient causes the decoherence of atomic spins to produce magnetic-field gradient relaxation.
Xiujie Fang +7 more
doaj +1 more source
Impact of aperture angle on magnetostatic shielding performances of magnetic shield cylinders
AIP Advances, 2022 The spin exchange relaxation free (SERF) atomic magnetometer plays an important role in ultrahigh sensitive magnetic measurements. With the improvement of signal response and the reduction of sensor noise, the sensitivity of the SERF atomic magnetometer ...
Lei Wang +3 more
doaj +1 more source
Low Noise VCSEL Driver for SERF Atomic Magnetometer
IOP Conference Series: Materials Science and Engineering, 2020 Abstract A new type of VCSEL (Vertical-Cavity Surface-Emitting Laser) which uses Pt1000 as a temperature sensitive component and non-magnetic heating membrane as a temperature actuator is designed for SERF (Spin-Exchange Relation-Free) atomic magnetometer, which can decrease the magnetic interference produced while heating or cooling ...
Feihu Wang, Zhaohui Hu, Xin Liu
openaire +1 more source
A New Method for Reduction of Atomic Magnetometer Noise Based on Multigene Genetic Programming
IEEE Access, 2019 An ultra-high precision magnetic field measurement is of great scientific and economic significance. An atomic magnetometer that operates in a spin-exchange relaxation-free (SERF) regime has superior sensitivity and, thus, is of great significance for ...
Wei Quan, Feng Liu, Wenfeng Fan
doaj +1 more source
Integrated optical probing scheme enabled by localized-interference metasurface for chip-scale atomic magnetometer. [PDF]
NanophotonicsAbstract Emerging miniaturized atomic sensors such as optically pumped magnetometers (OPMs) have attracted widespread interest due to their application in high‐spatial‐resolution biomagnetism imaging. While optical probing systems in conventional OPMs require bulk optical devices including linear polarizers and lenses for polarization conversion and ...
Hu J +5 more
europepmc +2 more sources
Photonics, 2023 The measurement of atomic spin polarization distribution in spin-exchange relaxation free (SERF) magnetometer is an important topic for improving the sensitivity and consistency of multi-channel magnetic field measurement applications.
Xiujie Fang +7 more
doaj +1 more source
Scientific Reports, 2017 The hybrid optical pumping spin exchange relaxation free (SERF) atomic magnetometers can realize ultrahigh sensitivity measurement of magnetic field and inertia.
Jian-Hua Liu +6 more
doaj +1 more source
Investigation on Rotation Response of Spin-Exchange Relaxation-Free Atomic Spin Gyroscope
IEEE Access, 2019 Spin-exchange relaxation-free atomic spin gyroscope (SERF gyro) has ultrahigh theoretical sensitivity and is regarded as one of the most potential atomic gyroscopes.
Yuanhong Yang +5 more
doaj +1 more source