Results 211 to 220 of about 25,141 (249)
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Dynamic analysis of atomic magnetometer and co-magnetometer
Physica B: Condensed Matter, 2016Abstract Some unsteady-state solutions of Bloch equation which well-describe the behavior of a magnetometer are obtained. These solutions are in accord with the experimental result of alkali-metal magnetometer and co-magnetometer gyroscope. Many interesting phenomena can be also achieved via the solutions.
Shihu Wang, Linke Yu, Wei Wang
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Microfabricated atomic magnetometers
2013Using the techniques of microelectromechanical systems, we are developing chip-scale atomic sensors based on laser excitation of alkali atoms. Recently, we demonstrated a magnetometer physics package based on coherent population trapping that had a sensitivity of 50 pT/Hzfrac12 at 10 Hz, had a volume of 12 mm3, and used 195 mW of power as presented by ...
S. Knappe, J. Kitching
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2016
Detection of weak magnetic fields with high spatial resolution is an important technology for various applications such as biological imaging, detection of MRI signals and fundamental physics. Cold atom magnetometry enables 10−11 T/\(\sqrt{\text{Hz}}\) sensitivities at the micron scale, that is, at the scale of a typical biological cell size.
Yujiro Eto, Mark Sadrove, Takuya Hirano
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Detection of weak magnetic fields with high spatial resolution is an important technology for various applications such as biological imaging, detection of MRI signals and fundamental physics. Cold atom magnetometry enables 10−11 T/\(\sqrt{\text{Hz}}\) sensitivities at the micron scale, that is, at the scale of a typical biological cell size.
Yujiro Eto, Mark Sadrove, Takuya Hirano
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Object surveillance with radio-frequency atomic magnetometers
Review of Scientific Instruments, 2020The capabilities of a radio-frequency atomic magnetometer for object detection based on magnetic induction tomography are explored. The determination of object orientation is demonstrated by utilizing the measurement geometry. The self-compensation configuration of the atomic magnetometer is implemented to address the issue of saturation of the sensor ...
P. Bevington +6 more
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Microfabricated atomic clocks and magnetometers
Journal of Optics A: Pure and Applied Optics, 2006We demonstrate the critical subsystems of a compact atomic clock based on a microfabricated physics package. The clock components have a total volume below 10 cm3, a fractional frequency instability of 6 × 10−10/τ1/2, and consume 200 mW of power. The physics package is easily adapted to function as a magnetometer with sensitivity below 50 pT Hz−1/2 at ...
S. Knappe +8 more
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Magnetoencephalography with an atomic magnetometer
Applied Physics Letters, 2006The 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 +3 more
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MICROFABRICATED ATOMIC CLOCKS AND MAGNETOMETERS
Laser Spectroscopy, 2005We 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 +6 more
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Highly sensitive multi-channel atomic magnetometer
2018 IEEE Sensors Applications Symposium (SAS), 2018We 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
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Magnetic Resonance Based Atomic Magnetometers
2016The 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 +2 more
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A frequency selective atom interferometer magnetometer
Journal of Modern Optics, 2014In 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 +4 more
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