Results 91 to 100 of about 183,781 (139)

Development and Prospects of Multi-Domain Geomagnetic Navigation and Positioning Technologies

Sensors
To address the pressing demand for autonomous navigation in GNSS-denied environments, this paper systematically reviews the development status and future trends of multi-domain geomagnetic navigation and positioning technologies.
Libo Zhu, Houpu Li, Bo Zhu, Bing Liu, Jineng Ouyang, Lei Xu, Shaofeng Bian, Fujiang Liu   +7 more
doaj   +1 more source

Advances in optically pumped He4 magnetometers : Resonance and nonresonance techniques

, 1970
Samples of optically pumped 23S1 helium atoms are currently studied in our laboratory for use in advanced magnetometer applications. The results of recent investigations of the effect of pumping beam orientation with respect to the observed magnetic ...
R.E. Slocum, Slocum, R.E.
core   +1 more source

Stroboscopic microwave spectroscopy of Voigt-based optically pumped magnetometers [PDF]

We present the results of stroboscopic microwave spectroscopy of a radio-frequency-dressed optically pumped magnetometer. The interaction between radio-frequency-dressed atoms and a synchronously pulsed microwave field followed by Voigt-effect-based ...
Pyragius, Tadas, Marin Florez, Hans, Fernholz, Thomas   +2 more
core   +1 more source

Green-pumped, picosecond MgO:PPLN optical parametric oscillator

, 2011
We investigate the performance of a magnesium-oxide-doped periodically poled lithium niobate crystal (MgO:PPLN) in an optical parametric oscillator (OPO) synchronously-pumped by 530nm, 20ps, 230MHz pulses with an average power of up to 2W from a ...
Florian Kienle, Dejiao Lin, Lin, Dejiao, David J. Richardson, Major, Huw, Richardson, David J., Kienle, Florian, Shepherd, David P., Shaif-ul Alam, Gawith, Corin B.E., Corin B. E. Gawith, Hung, Hazel, Huw E. Major, Alam, Shaif-ul, David P. Shepherd, Hazel S. S. Hung   +15 more
core   +1 more source

Development status of quantum precision measurement technology and exploration of its application in pipeline internal inspection

You-qi chuyun
ObjectiveLong-distance oil and gas pipelines develop toward larger diameters, higher steel grades and higher operating pressures. Sub-millimeter microcracks on girth welds and service-induced stress concentration are major hidden risks leading to ...
Kuan FU, Pengchao CHEN, Rui LI, Enpeng WANG, Chuanyu LU, Lili ZUO, Xiaoben LIU   +6 more
doaj   +1 more source

Development of Optically Pumped Magnetometers and Application to Magnetoencephalography

The application of optically pumped magnetometers (OPMs) to magnetoencephalography (MEG) has been actively studied in recent years. MEG is a non-invasive technique for measuring neural activity in the brain, and due to the recent helium shortage, OPM ...
伊藤, 陽介
core   +1 more source

Magnetocardiography measurements with $^4$He vector optically pumped magnetometers at room temperature

, 2017
Accepted Manuscript.International audienceIn this paper, we present a proof of concept study which demonstrates for the first time the possibility to record magnetocardiography (MCG) signals with $^4$He vector optically-pumped magnetometers (OPM ...
Corsi, M.C., F Berger, F Bertrand, Alcouffe, F., Lenouvel, F., G Cauffet, F Lenouvel, Morales, S., E Labyt, Berger, F., Bertrand, F., Gobbo, C., S Morales, Vanzetto, G., Labyt, E., W Fourcault, C Gobbo, F Alcouffe, G Vanzetto, M C Corsi, Cauffet, G., Le Prado, M., Fourcault, W., M Le Prado   +23 more
core   +1 more source

Bedside Magnetocardiography with a Scalar Sensor Array

Sensors
Decades of research have shown that magnetocardiography (MCG) has the potential to improve cardiac care decisions. However, sensor and system limitations have prevented its widespread adoption in clinical practice. We report an MCG system built around an
Geoffrey Z. Iwata, Christian T. Nguyen, Kevin Tharratt, Maximilian Ruf, Tucker Reinhardt, Jordan Crivelli-Decker, Madelaine S. Z. Liddy, Alison E. Rugar, Frances Lu, Kirstin Aschbacher, Ethan J. Pratt, Kit Yee Au-Yeung, Stefan Bogdanovic   +12 more
doaj   +1 more source

Helium Optically Pumped Magnetometers Can Detect Epileptic Abnormalities as Well as SQUIDs as Shown by Intracerebral Recordings. [PDF]

eNeuro, 2023
Badier JM, Schwartz D, Bénar CG, Kanzari K, Daligault S, Romain R, Mitryukovskiy S, Fourcault W, Josselin V, Le Prado M, Jung J, Palacios-Laloy A, Romain C, Bartolomei F, Labyt E, Bonini F.   +15 more
europepmc   +1 more source

Monitoring magnetic nanoparticle clustering and immobilization with thermal noise magnetometry using optically pumped magnetometers. [PDF]

Nanoscale Adv, 2023
Everaert K, Sander T, Körber R, Löwa N, Van Waeyenberge B, Leliaert J, Wiekhorst F.   +6 more
europepmc   +1 more source