Results 51 to 60 of about 90,554 (217)

Non-invasive detection of animal nerve impulses with an atomic magnetometer operating near quantum limited sensitivity [PDF]

, 2006
Magnetic fields generated by human and animal organs, such as the heart, brain and nervous system carry information useful for biological and medical purposes.
D Budker, D Sheng, G Bison, G Vasilakis, H Xia, Hari Riitta, IK Kominis, JP Wikswo, K Krnjevic, M Hämäläinen, MV Balabas, MV Balabas, O Alem, O Alem, R Katsuki, RS Wijesinghe, RS Wijesinghe, TH Sander, W Wasilewski   +18 more
core   +5 more sources

Measurement of the permanent electric dipole moment of the neutron [PDF]

, 2020
We present the result of an experiment to measure the electric dipole moment EDM) of the neutron at the Paul Scherrer Institute using Ramsey's method of separated oscillating magnetic fields with ultracold neutrons (UCN).
Abel, C, Afach, S, Ayres, N J, Baker, C A, Ban, G, Bison, G, Bodek, K, Bondar, V, Burghoff, M, Chanel, E, Chiu, P-J, Chowdhuri, Z, Clement, B, Crawford, C B, Daum, M, Dinani, R Tavakoli, Emmenegger, S, Ferraris-Bouchez, L, Fertl, M, Flaux, P, Franke, B, Fratangelo, A, Geltenbort, P, Green, K, Griffith, W C, Grujić, Z D, Harris, P G, Hayen, L, Heil, W, Henneck, R, Hild, N, Hodge, Z, Horras, M, Hélaine, V, Iaydjiev, P, Ivanov, S N, Kasprzak, M, Kermaidic, Y, Kirch, K, Knecht, A, Knowles, P, Koch, H-C, Komposch, S, Koss, P A, Kozela, A, Kraft, A, Krempel, J, Kuźniak, M, Lauss, B, Lefort, T, Lemière, Y, Leredde, A, Mohanmurthy, P, Mtchedlishvili, A, Musgrave, M, Naviliat-Cuncic, O, Pais, D, Piegsa, F M, Pierre, E, Pignol, G, Plonka-Spehr, C, Prashanth, P N, Quéméner, G, Rawlik, M, Rebreyend, D, Rienäcker, I, Ries, D, Roccia, S, Rogel, G, Rozpedzik, D, Schmidt-Wellenburg, P, Schnabel, A, Severijns, N, Shiers, D, Thorne, J A, van der Grinten, M, Virot, R, Voigt, J, Weis, A, Wursten, E, Wyszynski, G, Zejma, J, Zenner, J, Zsigmond, G   +83 more
core   +5 more sources

On‐Scalp Magnetoencephalography Based On Optically Pumped Magnetometers Can Detect Mesial Temporal Lobe Epileptiform Discharges

medRxiv, 2023
The validation of on-scalp magnetoencephalography based on optically pumped magnetometers (OPM-MEG) for clinical applications requires the assessment of the spatial concordance between reconstructed neural sources and intracranial data recorded ...
O. Feys, M. Ferez, P. Corvilain, Sophie Schuind, Estelle Rikir, Benjamin Legros, Nicolas Gaspard, Niall Holmes, Matthew J. Brookes, Vincent Wens, X. De Tiège   +10 more
semanticscholar   +1 more source

An optically pumped magnetometer working in the light-shift dispersed Mz mode [PDF]

, 2017
We present an optically pumped magnetometer working in a new operational mode— the light-shift dispersed Mz (LSD-Mz) mode. It is realized combining various features; (1) high power off-resonant optical pumping; (2) Mz configuration, where pumping light
IJsselsteijn, Rob, Schillig, Bastian, Scholtes, Theo, Schultze, Volkmar, Stolz, Ronny, Woetzel, Stefan   +5 more
core   +2 more sources

Sensor array design of optically pumped magnetometers for accurately estimating source currents

NeuroImage, 2023
An optically pumped magnetometer (OPM) is a new generation of magnetoencephalography (MEG) devices that is small, light, and works at room temperature. Due to these characteristics, OPMs enable flexible and wearable MEG systems.
Yusuke Takeda, Tomohiro Gomi, Ryu Umebayashi, Sadamu Tomita, Keita Suzuki, Nobuo Hiroe, Jiro Saikawa, Tatsuya Munaka, Okito Yamashita   +8 more
doaj   +1 more source

Optical hyperpolarization and NMR detection of $^{129}$Xe on a microfluidic chip

, 2013
Optically hyperpolarized $^{129}$Xe gas has become a powerful contrast agent in nuclear magnetic resonance (NMR) spectroscopy and imaging, with applications ranging from studies of the human lung to the targeted detection of biomolecules.
Bajaj, Vikram S., Donley, Elizabeth A., Jimenez-Martinez, Ricardo, Kennedy, Daniel J., Kitching, John, Knappe, Svenja, Ring, Hattie L., Rosenbluh, Michael, Seltzer, Scott J.   +8 more
core   +1 more source

Frequency Response of Optically Pumped Magnetometer with Nonlinear Zeeman Effect

Applied Sciences, 2020
Optically pumped alkali atomic magnetometers based on measuring the Zeeman shifts of the atomic energy levels are widely used in many applications because of their low noise and cryogen-free operation.
Rui Zhang, Teng Wu, Jingbiao Chen, Xiang Peng, Hong Guo   +4 more
doaj   +1 more source

Wireless optically pumped magnetometer MEG

NeuroImage
The current magnetoencephalography (MEG) systems, which rely on cables for control and signal transmission, do not fully realize the potential of wearable optically pumped magnetometers (OPM). This study presents a significant advancement in wireless OPM-MEG by reducing magnetization in the electronics and developing a tailored wireless communication ...
Hao Cheng, Kaiyan He, Congcong Li, Xiao Ma, Fufu Zheng, Wei Xu, Pan Liao, Rui Yang, Dongxu Li, Lang Qin, Shuai Na, Bingjiang Lyu, Jia-Hong Gao   +12 more
openaire   +3 more sources

Fast and robust optically pumped cesium magnetometer [PDF]

Advanced Optical Technologies, 2019
Abstract We present a fast and robust optically pumped magnetometer that is based on a feedback-controlled spin ensemble of cesium atoms in spin-polarized vapor. The table-top system is intended for operation in unshielded environment, and its design allows conversion into a handheld sensor head.
Victor Lebedev, Stefan Hartwig, Thomas Middelmann   +2 more
openaire   +1 more source

Hardware Design and Implementation of a High-Precision Optically Pumped Cesium Magnetometer System Based on the Human-Occupied Vehicle Platform

Applied Sciences
High-precision magnetometers play a crucial role in ocean exploration, geophysical prospecting, and military and security applications. Installing them on human-occupied vehicle (HOV) platforms can greatly enhance ocean exploration capabilities and ...
Keyu Zhou, Qimao Zhang, Qisheng Zhang
doaj   +1 more source