Results 31 to 40 of about 25,141 (249)
Repumping atomic media for an enhanced sensitivity atomic magnetometer
Optics Express, 2022 Atomic vapour magnetometers sense the local magnetic field strength by measuring the resulting precession rate of a well-defined quantum state. An essential prerequisite for this approach is a requirement to drive the media into this quantum state, which is frequently achieved via optical pumping.
Rujie Li +2 more
openaire +2 more sources
Detection of radio frequency magnetic fields using nonlinear magneto-optical rotation [PDF]
, 2006 We describe a room-temperature alkali-metal atomic magnetometer for detection of small, high frequency magnetic fields. The magnetometer operates by detecting optical rotation due to the precession of an aligned ground state in the presence of a small ...
D. Budker +9 more
core +2 more sources
Multi-sensor magnetoencephalography with atomic magnetometers [PDF]
Physics in Medicine and Biology, 2013 The authors have detected magnetic fields from the human brain with two independent, simultaneously operating rubidium spin-exchange-relaxation-free magnetometers. Evoked responses from auditory stimulation were recorded from multiple subjects with two multi-channel magnetometers located on opposite sides of the head.
Cort N, Johnson +2 more
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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
Parametric modulation of an atomic magnetometer [PDF]
Applied Physics Letters, 2006 The authors report on a rubidium atomic magnetometer designed for use in a shielded environment. Operating in the spin-exchange relaxation-free regime, the magnetometer utilizes parametric modulation of the z-magnetic field to suppress noise associated with airflow through the oven and to simultaneously detect x- and y-field components, using a single ...
Zhimin, Li +2 more
openaire +2 more sources
Miniature atomic magnetometer integrated with flux concentrators [PDF]
, 2009 High permeability magnetic flux concentrators are used to enhance the sensitivity of an atomic magnetometer operating in the spin-exchange relaxation-free regime.
Griffith, W Clark +4 more
core +1 more source
AIP Advances, 2023 Although vector potentials are more intrinsic physical quantities than magnetic and electric fields, measuring them macroscopically is difficult. A double-nested Helmholtz-type vector potential coil, consisting of an elongated solenoid coil wound around ...
Y. Shoji, M. Daibo
doaj +1 more source
Analysis and Correction of the Crosstalk Effect in a Three-Axis SERF Atomic Magnetometer
Photonics, 2022 Three-axis atomic magnetometers have an excellent advantage for determining the complete vector information of a magnetic field to be measured. However, the crosstalk effect, which leads to an error output on one axis owing to a magnetic field on the ...
Yeguang Yan +7 more
doaj +1 more source
Magnetoencephalography with a chip-scale atomic magnetometer. [PDF]
Biomed Opt Express, 2012 We report on the measurement of somatosensory-evoked and spontaneous magnetoencephalography (MEG) signals with a chip-scale atomic magnetometer (CSAM) based on optical spectroscopy of alkali atoms. The uncooled, fiber-coupled CSAM has a sensitive volume of 0.77 mm(3) inside a sensor head of volume 1 cm(3) and enabled convenient handling, similar to an ...
Sander TH +5 more
europepmc +3 more sources
Different sensitivities of two optical magnetometers realized in the same experimental arrangement [PDF]
, 2019 In this article, operation of optical magnetometers detecting static (DC) and oscillating (AC) magnetic fields is studied and comparison of the devices is performed. To facilitate the comparison, the analysis is carried out in the same experimental setup,
Popiołek, Kacper +2 more
core +2 more sources