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Single-beam double-pass miniaturized atomic magnetometer for bio-magnetic imaging systems [article]

Xiaojie Li, Zhihao Guo, Rui Yang, Yanying Feng
2022 arXiv   pre-print
In this paper, we propose a low-cost solution for a bio-magnetic imaging system based on atomic magnetometers, in which one laser source is used for a multi-channel atomic magnetometer sensor array.  ...  This design is especially suitable for atomic magnetometers operating in arrays as a basic building element for low-cost bio-magnetic imaging systems.  ...  The double-pass magnetometer sensor is placed in the center of a five-layer magnetic shield with a shielding factor larger than 10 5 , which provides a zero-field environment.  ... 
arXiv:2204.12746v1 fatcat:67qqeja7orbolmggbzycnaor2y

Study of Magnetic Noise of a Multi-Annular Ferrite Shield

Jixi Lu, Danyue Ma, Ke Yang, Wei Quan, Junpeng Zhao, Bozheng Xing, Bangcheng Han, Ming Ding
2020 IEEE Access  
Ferrites are promising nonmetallic materials used for the fabrication of low-noise magnetic shields because they possess high permeability and high electrical resistivity.  ...  Our study provides a low-cost, readily available, and low-noise ferrite shield structure. INDEX TERMS Ferrite, magnetic shield, magnetic noise, atomic magnetometer.  ...  Fig. 7 shows the magnetic field sensitivities for the SERF magnetometer in the presence and absence of the ferrite shield and the probe noise.  ... 
doi:10.1109/access.2020.2976785 fatcat:jnzkljcrwjgjjkme36dq5epv2y

Nuclear Spin Gyroscope Based on an Atomic Comagnetometer

T. W. Kornack, R. K. Ghosh, M. V. Romalis
2005 Physical Review Letters  
With a K-3He co-magnetometer we demonstrate rotation sensitivity of 5 10^(-7) rad/sec/Hz^(1/2).  ...  Spin precession due to magnetic fields as well as their gradients and transients can be cancelled in this arrangement.  ...  Many aspects of the system, such as magnetic shielding and mechanical stability will improve with smaller size.  ... 
doi:10.1103/physrevlett.95.230801 pmid:16384290 fatcat:uy4ahllvkfhlbjf7egcymm4dwy

Quantitative 2D Magnetorelaxometry Imaging of Magnetic Nanoparticles using Optically Pumped Magnetometers

Aaron Jaufenthaler, Peter Schier, Thomas Middelmann, Maik Liebl, Frank Wiekhorst, Daniel Baumgarten
2020 Sensors  
In this paper, we present quantification, quantitative 1D reconstruction, and quantitative 2D imaging of MNP by exploiting optically pumped magnetometers for MRX.  ...  While highlighting the potential of commercially available optically pumped magnetometers (OPM) for MRXI, we discuss current limitations of the used OPM.  ...  OPM The OPM used in this work are commercially available QZFM magnetometers from QuSpin (QuSpin Inc., Louisville, CO, USA), provided by the PTB's core faciltiy Metrology of Ultra-Low Magnetic Fields.  ... 
doi:10.3390/s20030753 pmid:32013245 pmcid:PMC7038374 fatcat:rn4a6bu6ung77gkx62fjrr2374

Search for topological defect dark matter using the global network of optical magnetometers for exotic physics searches (GNOME) [article]

Samer Afach, Ben C. Buchler, Dmitry Budker, Conner Dailey, Andrei Derevianko, Vincent Dumont, Nataniel L. Figueroa, Ilja Gerhardt, Zoran D. Grujić, Hong Guo, Chuanpeng Hao, Paul S. Hamilton (+37 others)
2021 arXiv   pre-print
We search the data, consisting of correlated measurements from optical atomic magnetometers located in laboratories all over the world, for patterns of signals propagating through the network consistent  ...  Here, we report the results of a search for transient signals from axion-like particle domain walls with the Global Network of Optical Magnetometers for Exotic physics searches (GNOME).  ...  If the ALP field only couples to electron spins, interaction between the ALP field and the magnetic shield will reduce ALP-induced signal amplitudes in each magnetometer by roughly the magnetic shielding  ... 
arXiv:2102.13379v3 fatcat:wkabnnbuevbyddrkh5em5364xy

Sensitivity Optimization for NV-Diamond Magnetometry [article]

John F. Barry, Jennifer M. Schloss, Erik Bauch, Matthew J. Turner, Connor A. Hart, Linh M. Pham, Ronald L. Walsworth
2019 arXiv   pre-print
Solid-state spin systems including nitrogen-vacancy (NV) centers in diamond constitute an increasingly favored quantum sensing platform.  ...  Our analysis of sensitivity optimization establishes a foundation to stimulate development of new techniques for enhancing solid-state sensor performance.  ...  bias magnetic field of several gauss or higher suppresses dephasing from transverse electric fields and strain.  ... 
arXiv:1903.08176v1 fatcat:tzw3xp7pcnevzkr5cad7u2x7kq

Magnetic flux noise in copper oxide superconductors

M. J. Ferrari, Mark Johnson, F. C. Wellstood, J. J. Kingston, T. J. Shaw, John Clarke
1994 Journal of Low Temperature Physics  
of a magnetometer, one is interested not in the measured flux noise S_(f), but in the total magnetic field noise (gAeft)2 , where g is the factor by which the transformer enhances the magnetic field  ...  Magnetic Field DependenceThe measurements which I have described thus far were ali made in the ambient magnetic field within the mu-metal shield, B < 1 I.tT.  ... 
doi:10.1007/bf00755416 fatcat:7mughdhmtrgbngmcm2tnbvidqm

Search for new physics with atoms and molecules

M. S. Safronova, D. Budker, D. DeMille, Derek F. Jackson Kimball, A. Derevianko, Charles W. Clark
2018 Reviews of Modern Physics  
Key results are presented in the context of potential new physics and in the broader context of similar investigations in other fields. Ongoing and future experiments of the next decade are discussed.  ...  This article reviews recent developments in tests of fundamental physics using atoms and molecules, including the subjects of parity violation, searches for permanent electric dipole moments, tests of  ...  blocked by the shield, it does affect charges and spins in the shield via the action of the "real" magnetic field B = κB .  ... 
doi:10.1103/revmodphys.90.025008 fatcat:swok63t6ibgxbhlgtkhiqczw3y

Sponsored Collection | Humble Beginning, Bright Future: Institute of Physics (CAS) at 90

2018 Science  
It studies the microworld, including subatomic particles, and the macroworld, including magnetic fields and plasma found in space.  ...  Humble Beginnings, Bright Future Institute of Physics (CAS) at 90 INTRODUCTIONS 3 P hysics is a field of extremes.  ...  This work was partially supported by the National Natural Science Foundation of China, the Ministry of Science and Technology of the People's Republic of China, the Chinese Academy of Sciences, the Xinjiang  ... 
doi:10.1126/science.360.6389.673-b fatcat:n4txuzzlyrbpdlzzlwig34h2la

Electromagnetic Field Sensing with Rydberg Atoms in Vapor Cells

Lu Ma, University, My
2021
I first investigate the detection of strong magnetic fields ($sim$ 1~T) in the Paschen-Back regime.  ...  Research of hot atomic vapor systems has a long history.  ...  L is the inner cell length, and w is height of the aperture on the magnetic field shielding end caps.  ... 
doi:10.7302/1423 fatcat:rkjrlxwo4nd6jdeomsnzvjqgc4