Results 61 to 70 of about 26,270 (270)

EDGE DETECTION IN ATOMIC MAGNETOMETER IMAGING

Journal of the Siena Academy of Sciences, 2019
We present the results of an edge detection algorithm applied on Electromagnetic Induction Imaging provided by an Atomic radio-frequency Magnetometer operating in an unshielded environment and at room temperature. Atomic Magnetometers have been already used for Imaging Techniques in the last few years, but the image reconstruction and the object ...
Papi, N., Cali, E., Marinelli, Carmela, Mariotti, Emilio, Millucci, Vincenzo   +4 more
openaire   +3 more sources

Benchtop Magnetic Shielding for Benchmarking Atomic Magnetometers

IEEE Transactions on Instrumentation and Measurement, 2023
Here, a benchtop hybrid magnetic shield containing four mumetal cylinders and nine internal flexible printed circuit boards is designed, constructed, tested, and operated. The shield is designed specifically as a test-bed for building and operating ultra-sensitive quantum magnetometers. The geometry and spacing of the mumetal cylinders are optimized to
Peter J. Hobson, Niall Holmes, Prashant Patel, Ben Styles, James Chalmers, Chris Morley, Alister Davis, Michael Packer, Thomas X. Smith, Sintija Raudonyte, Darragh Holmes, Robert Harrison, David Woolger, Dominic Sims, Matthew J. Brookes, Richard Bowtell, Mark Fromhold   +16 more
openaire   +2 more sources

Magnetometer suitable for Earth field measurement based on transient atomic response

, 2012
We describe the development of a simple atomic magnetometer using $^{87}$Rb vapor suitable for Earth magnetic field monitoring. The magnetometer is based on time-domain determination of the transient precession frequency of the atomic alignment around ...
A Lezama, H Failache, L Lenci, P Valente, S Barreiro, Steck D A, Weinstock H   +6 more
core   +1 more source

Quantum limit of optical magnetometry in the presence of ac-Stark shifts [PDF]

, 2000
We analyze systematic (classical) and fundamental (quantum) limitations of the sensitivity of optical magnetometers resulting from ac-Stark shifts. We show that in contrast to absorption-based techniques, the signal reduction associated with classical ...
Fleischhauer, M., Matsko, A. B., Scully, M. O.   +2 more
core   +3 more sources

Microfabricated atomic magnetometers and applications [PDF]

2008 IEEE International Frequency Control Symposium, 2008
We describe recent work at NIST to develop compact, sensitive atomic magnetometers using a combination of precision optical spectroscopy, atomic physics and techniques of micro-electro-mechanical systems (MEMS). These instruments have sensor head volumes in the range of a few cubic millimeters but are capable of sensing magnetic fields of a few ...
John Kitching, Svenja Knappe, Vishal Shah, Peter Schwindt, Clark Griffith, Ricardo Jimenez, Jan Preusser, L.-A. Liew, J. Moreland   +8 more
openaire   +1 more source

Three-Axis Atomic Magnetometer Employing Longitudinal Field Modulation

IEEE Photonics Journal, 2017
A three-axis atomic magnetometer employing longitudinal field modulation is demonstrated theoretically and experimentally. The operational condition of this magnetometer is that the longitudinal z-component of the external magnetic field is dominant ...
Zhichao Ding, Jie Yuan, Guangfeng Lu, Yingying Li, Xingwu Long   +4 more
doaj   +1 more source

A Coil Constant Calibration Method Based on the Phase-Frequency Response of Alkali Atomic Magnetometer

Photonic Sensors, 2019
We propose an in-situ method to calibrate the coil constants of the optical atomic magnetometer. This method is based on measuring the Larmor precession of spin polarized alkali metal atoms and has been demonstrated on a K-Rb hybrid atomic magnetometer ...
Han Yao, Danyue Ma, Junpeng Zhao, Jixi Lu, Ming Ding   +4 more
doaj   +1 more source

Suppression of thermal coupling noise in the SERF atomic co-magnetometer

Results in Physics, 2023
Heating the alkali metal vapor cell to obtain high atomic density is a prerequisite for realizing the high-precision measurement for spin-exchange relaxation-free (SERF) co-magnetometer.
Jiasen Ruan, Lihong Duan, Yang Fu, Lv Yang, Wenfeng Fan, Xinxiu Zhou, Wei Quan   +6 more
doaj   +1 more source

Multichannel optical atomic magnetometer operating in unshielded environment

, 2016
A multi-channel atomic magnetometer operating in an unshielded environment is described and characterised. The magnetometer is based on D1 optical pumping and D2 polarimetry of Cs vapour contained in gas-buffered cells.
Bevilacqua, Giuseppe, Biancalana, Valerio, Chessa, Piero, Dancheva, Yordanka   +3 more
core   +1 more source

Composition‐Tuned Enhancement of the Anomalous Nernst Effect in FeCo–Pt Thin Films on Rigid and Flexible Substrates

Advanced Engineering Materials, EarlyView.
Disordered (Fe50Co50)1−xPtx thin films exhibit a pronounced anomalous Nernst effect (ANE) with a strong composition dependence on both rigid and flexible substrates. The transverse thermoelectric response peaks near 22.5 at.% Pt, accompanied by enhanced αxy/σxy scaling, thermal transport, and ANE sensitivity.
Mojtaba Mohammadi, Hiroyuki Awano, Kenji Tanabe   +2 more
wiley   +1 more source