Results 231 to 240 of about 26,270 (270)
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Applied Scientific Research, 1973
The application of a novel atomic beam magnetic resonance technique to the measurement of magnetic fields is described. The technique has been used previously in electric field experiments to determine the upper limit to the permanent electric dipole moment of the cesium atom.
J. P. Carrico, T. S. Stein
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The application of a novel atomic beam magnetic resonance technique to the measurement of magnetic fields is described. The technique has been used previously in electric field experiments to determine the upper limit to the permanent electric dipole moment of the cesium atom.
J. P. Carrico, T. S. Stein
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Mems-Enabled Quantum Atomic Magnetometers
2021 IEEE 34th International Conference on Micro Electro Mechanical Systems (MEMS), 2021Sensors based on quantum-effects in atoms have seen rapid transitions from proof-of-principle experiments to commercial devices. Quantum atomic magnetometers based on alkali vapor cells benefit from high sensitivities combined with simple optical setups. This can be beneficial for magnetic imaging applications that need large numbers of pixels. We have
Sean Krzyzewski +2 more
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Chip Scale Atomic Magnetometers
INTERMAG 2006 - IEEE International Magnetics Conference, 2006An optically pumped magnetometer was drastically miniaturized, by taking advantage of MEMS techniques, producing the chip-scale atomic magnetometers (CSAM) physics package. The key component of the package is an alkali vapor cell. To probe the magnetic field experienced by the atoms, the injection current to the VCSEL was modulated at 3.4 GHz near half
P. Schwindt +7 more
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Chip-scale atomic magnetometer
2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, 2006We report recent improvements on our microfabricated atom-optical magnetometer. Using a semiconductor laser and 1 mm3 alkali vapor cell, our magnetometer detects a magnetic field at 50 pT / Hz1/2 sensitivity in a 12 mm3 package.
P. D. D. Schwindt +4 more
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Chip-scale atomic magnetometer
Applied Physics Letters, 2004Using the techniques of microelectromechanical systems, we have constructed a small low-power magnetic sensor based on alkali atoms. We use a coherent population trapping resonance to probe the interaction of the atoms’ magnetic moment with a magnetic field, and we detect changes in the magnetic flux density with a sensitivity of 50pTHz−1∕2 at 10Hz ...
Peter D. D. Schwindt +6 more
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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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