Results 241 to 250 of about 26,270 (270)

Magnetoencephalography with an atomic magnetometer

Applied Physics Letters, 2006
The authors demonstrate detection and mapping of brain magnetic fields evoked by auditory stimulation with a noncryogenic magnetometer based on spin precession of potassium atoms in spin-exchange-relaxation-free regime. Optical readout using a photodiode array allows flexibility in detector placement while using common elements for most components of ...
H. Xia, A. Ben-Amar Baranga, D. Hoffman, M. V. Romalis   +3 more
openaire   +1 more source

MICROFABRICATED ATOMIC CLOCKS AND MAGNETOMETERS

Laser Spectroscopy, 2005
We demonstrate the critical subsystems of compact atomic clocks and magnetometers based on microfabricated physics packages. The clock components have a volume below 5 cm3, a fractional frequency instability below 6times10-10tau1/2, and consume 200 mW of power.
S. KNAPPE, P. D. D. SCHWINDT, V. GERGINOV, V. SHAH, H. G. ROBINSON, L. HOLLBERG, J. KITCHING   +6 more
openaire   +1 more source

Highly sensitive multi-channel atomic magnetometer

2018 IEEE Sensors Applications Symposium (SAS), 2018
We describe a high-sensitivity 16-channel magnetic sensor based on a spin-exchange relaxation-free (SERF) atomic magnetometer, the most sensitive cryogen-free magnetic field sensor. It has been developed in order to accelerate magnetic measurements in various fields, such as neuroscience and biomedical research, and improve the current technologies ...
Young Jin Kim, Igor Savukov
openaire   +1 more source

Magnetic Resonance Based Atomic Magnetometers

2016
The chapter gives a comprehensive account of the theory of atomic magnetometers deploying optically detected magnetic resonance (ODMR) in spin-polarized atomic ensembles, and of the practical realization of such magnetometers. We address single laser beam experiments throughout, but give explicit hints on how the results can be extended to pump-probe ...
Antoine Weis, Georg Bison, Zoran D. Grujić   +2 more
openaire   +1 more source

A frequency selective atom interferometer magnetometer

Journal of Modern Optics, 2014
In this article, we discuss the magnetic-field frequency selectivity of a time-domain interferometer based on the number and timing of intermediate pulses. We theoretically show that by adjusting the number of pulses and the -pulse timing, we can control the frequency selectivity of the interferometer to time varying and DC magnetic fields.
D.A. Braje, S.A. DeSavage, C.L. Adler, J.P. Davis, F.A. Narducci   +4 more
openaire   +1 more source

Single-beam three-axis atomic magnetometer

Applied Physics Letters, 2016
A single-beam atomic magnetometer being operated near zero-field and measuring three-axis fields simultaneously is demonstrated. We produce a rotating field on the x-0-y plane with the frequency of 90 Hz and a modulation field in the z axis at 130 Hz.
Haichao Huang, Haifeng Dong, Lin Chen, Yang Gao   +3 more
openaire   +1 more source

Microfabricated Atomic Magnetometer

IEEE Sensors, 2005., 2006
P.D.D. Schwindt, S. Knappe, V. Shah, L. Hollberg, J. Kitching, L.-A. Liew, J. Moreland   +6 more
openaire   +1 more source

A kilohertz bandwidth and sensitive scalar atomic magnetometer using an optical multipass cell

Measurement: Journal of the International Measurement Confederation, 2022
KENNETH TETTEH AKITI
exaly  

A Miniature Wide Band Atomic Magnetometer

2011
Abstract : Magnetometers and electromagnetic (EM) devices are two of the most commonly used instruments for searching for UXO. Research in this area has progressed from the problem of detecting possible UXO items to that of discriminating between hazardous and non-hazardous underground objects. Accurate identification of underground items requires that
openaire   +1 more source

High-sensitivity pump–probe atomic magnetometer based on single fiber-coupled

Optics and Laser Technology, 2023
Binbin Zhao, Junjian Tang, Hongying Yang
exaly