Results 191 to 200 of about 5,746 (226)
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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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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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Interleaved NQR detection using atomic magnetometers
Journal of Magnetic Resonance, 2022Interleaved Nuclear Quadrupole Resonance (NQR) detection was conducted on ammonium nitrate and potassium chlorate using two 87Rb magnetometers, where potassium chlorate is measured during the T1 limited recovery time of ammonium nitrate. The multi-pass magnetometers are rapidly matched to the NQR frequencies, 531 kHz and 423 kHz, with the use of a ...
Darwin R, Quiroz +5 more
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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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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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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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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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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
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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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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