Results 11 to 20 of about 1,097,340 (266)

Resonant-Cavity Field Measurements [PDF]

Journal of Applied Physics, 1955
The application of perturbation techniques to the quantitative measurement of both relative electric and relative magnetic fields in resonant cavities is described. The apparatus, procedures, advantages, and limitations are discussed, and the experimental results are compared with the calculable field distributions of a coaxial resonator.
Kitchen, S. W., Schelberg, A. D.
openaire   +3 more sources

OMMR: Co-registration toolbox of OPM-MEG and MRI

Frontiers in Neuroscience, 2022
Magnetoencephalography (MEG) based on optically pumped magnetometers (OPM-MEG) has shown better flexibility in sensor configuration compared with the conventional superconducting quantum interference devices-based MEG system while being better suited for
Fuzhi Cao, Fuzhi Cao, Nan An, Nan An, Weinan Xu, Weinan Xu, Wenli Wang, Wenli Wang, Wen Li, Wen Li, Chunhui Wang, Chunhui Wang, Yanfei Yang, Yanfei Yang, Min Xiang, Min Xiang, Yang Gao, Yang Gao, Xiaolin Ning, Xiaolin Ning   +19 more
doaj   +1 more source

Compact optical pumping system based on offaxis freeform mirror collimation for miniaturized atomic gyroscopes [PDF]

EPJ Web of Conferences
Conventional optical systems for laser beam expansion, collimation, and reflective path configurations in miniaturized atomic gyroscopes face challenges due to excessive volume and component complexity, limiting further optical integration.
Xu Yan, Chai Zhen, Li Jianli
doaj   +1 more source

Optimal design of bi-planar heater with magnetic field self-suppression configuration based on multi-objective optimization

Results in Physics, 2023
As a crucial component, the vapor cell serves as the fundamental sensing element in various atomic sensors, and electric heating is typically required to enhance the density of alkali metal atoms.
Huimin Wang, Shuying Wang, Bo Li, Yujie Qian, Jixi Lu   +4 more
doaj   +1 more source

A Quantitative Measure of Field Illumination [PDF]

Journal of Biomolecular Techniques : JBT, 2015
In this paper, we describe a statistically based algorithm to quantify the uniformity of illumination in an optical light microscopy imaging system that outputs a single quality factor (QF) score. The importance of homogeneous field illumination in quantitative light microscopy is well understood and often checked.
Claire M, Brown, Andrew, Reilly, Richard W, Cole   +2 more
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Measuring huge magnetic fields [PDF]

Nature, 2002
Huge magnetic fields are predicted to exist in the high-density region of plasmas produced during intense laser-matter interaction, near the critical-density surface where most laser absorption occurs, but until now these fields have never been measured.
Tatarakis, M, Watts, I, Beg, F, Clark, E, Dangor, A, Gopal, A, Haines, MG, Norreys, P, Wagner, U, Wei, MS, Zepf, M, Krushelnick, K   +11 more
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Approximating Information Measures for Fields [PDF]

Entropy, 2020
We supply corrected proofs of the invariance of completion and the chain rule for the Shannon information measures of arbitrary fields, as stated by Dębowski in 2009. Our corrected proofs rest on a number of auxiliary approximation results for Shannon information measures, which may be of an independent interest.
openaire   +3 more sources

Modeling and Measuring of Light Shift in Optically Pumped Atomic Magnetometers

IEEE Photonics Journal
The light shift is a significant error source of optically pumped atomic magnetometers (OPAMs), requiring accurate calculation or measurement to assess its impact on the accuracy of OPAMs.
Yuntian Zou, Xiangyang Zhou, Jiali Liu, Chi Fang, Jinghong Xu, Wei Quan, Liwei Jiang   +6 more
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Optimization and Analysis of Tangential Component Orientations in OPM-MEG Sensor Array

Bioengineering
Optically pumped magnetometers (OPMs) have brought a transformative advancement to magnetoencephalography (MEG), enabling flexible, noncryogenic, and wearable neuroimaging systems.
Wenli Wang, Fuzhi Cao, Nan An, Wen Li, Chunhui Wang, Zhenfeng Gao, Min Xiang, Xiaolin Ning   +7 more
doaj   +1 more source

Single-light-source three-axis atomic magnetometer based on orthogonal and non-overlapping dual-pump beams

Results in Physics, 2023
In this paper, we propose a three-axis atomic magnetometer (AM), in which one light beam is divided into two orthogonal spatially separated pump beams by a lateral displacement polarized beam splitter and reflector mirrors; this scheme suppresses the ...
Lin Li, Junjian Tang, Binbin Zhao, Yueyang Zhai   +3 more
doaj   +1 more source