Results 171 to 180 of about 6,142 (212)

Superconductive quantum fluxmeter—superconductive quantum magnetometer with external feedback

Cryogenics, 1997
Abstract In this article transfer and noise parameters of superconductive quantum magnetometers with external feedback functioning as superconductive quantum fluxmeters (SQFs) are analysed. From the derived relationships it follows that they are capable of measuring magnetic flux acting on superconductive coils with unknown geometrical structure, and
Vladimír Zrubec, Anton Urban
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Comparison of quantum CPT and EPR magnetometers

Novel Optical Systems, Methods, and Applications XXIII, 2020
Experimentally compared for the first time is the sensitivity of two magnetometer types implemented on a common base of rubidium atomic clock with coherent population trapping (CPT). The first magnetometer used a magneto-sensitive optically excited CPT resonance, the other measured field strength through the electron paramagnetic resonance (EPR ...
Daba Radnatarov, Valerii Andryushkov, Sergey M. Kobtsev   +2 more
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A magnetometer based on quantum interference effects

SPIE Proceedings, 2005
We have investigated some possibilities to use effect of Electromagnetically Induced Transparency (EIT), which is based on quantum interference, for measuring magnetic fields. Multi-frequency laser light is driving atomic transitions (e.g. in a Λ-type excitation scheme), and the atoms are decaying into a super positional dark state, in which the ...
R. Lammegger, S. Hatzl, A. F. Huss, Laurentius Windholz   +3 more
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Multilayer MgB2 superconducting quantum interference filter magnetometers

Applied Physics Letters, 2016
We report two types of all-MgB2 superconductive quantum interference filter (SQIF) magnetometers that can measure absolute magnetic fields with high sensitivity. In one configuration, the SQIFs were made of 20 multilayer nonplanar all-MgB2 superconducting quantum interference devices (SQUIDs) connected in parallel with loop areas ranging in size from 0.
Galan Elias, Melbourne Thomas, Davidson Bruce A, Xi X X, Chen Ke   +4 more
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A Superconducting Micro‐Magnetometer for Quantum Vortex in Superconducting Nanoflakes

Advanced Materials, 2023
AbstractSuperconducting quantum interferometer device (SQUID) plays a key role in understanding electromagnetic properties and emergent phenomena in quantum materials. The technological appeal of SQUID is that its detection accuracy for the electromagnetic signal can precisely reach the quantum level of a single magnetic flux.
Xiangyu Bi, Feifan Tian, Ganyu Chen, Zeya Li, Feng Qin, Yang‐Yang Lv, Junwei Huang, Caiyu Qiu, Lingyi Ao, Yanbin Chen, Genda Gu, Yanfeng Chen, Hongtao Yuan   +12 more
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Superconducting Quantum Interference Device (SQUID) Magnetometers

2016
Direct Current Superconducting QUantum Interference Devices (dc SQUIDs) are sensors for the detection of magnetic flux or any physical quantity that can be transformed into magnetic flux. They consist of a superconducting loop interrupted by two resistively shunted Josephson tunnel junctions.
Matthias Schmelz, Ronny Stolz
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Quantum limit sensitivity of coherent dark-state magnetometers

Summaries of Papers Presented at the Lasers and Electro-Optics. CLEO '02. Technical Diges, 2003
Summary form only given. The measurement of magnetic fields is done by magnetometers. In an atomic cell experiment the medium is Doppler broadened and the decay rate of the coherence between the lower lying levels are determined by the time of flight. For a homogeneously broadened medium the trapped neutral atoms can be used.
null Hwang Lee, I.K. Kulikov, A.P. Dowling   +2 more
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Superconductive Digital Magnetometers with Single-Flux-Quantum Electronics

IEICE Transactions on Electronics, 2010
Superconducting Quantum Interference Devices (SQUIDs) are known to be the most sensitive magnetometers, used in a wide range of applications like biomagnetism, geomagnetism, Non Destructive Evaluation (NDE), metrology or fundamental science. For all these applications, the SQUID sensor is used in analog mode and associated with a carefully designed ...
Pascal FEBVRE, Torsten REICH
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Gradiometric investigation of a cesium-vapor quantum magnetometer

Technical Physics, 2007
Experiments aimed to determine the sensitivity and the optical shift of the output frequency of a magnetometer based on optical pumping of cesium atoms and intended for a neutron magnetic resonance stabilization system are described. A gradiometric arrangement used in these experiments makes it possible to reduce the effect of magnetic field variations
E. B. Aleksandrov, M. V. Balabas, S. P. Dmitriev, N. A. Dovator, A. I. Ivanov, I. A. Krasnoshchekova, V. N. Kulyasov, V. V. Marchenkov, A. S. Pazgalev, A. P. Serebrov, V. A. Soloveĭ, G. E. Shmelev   +11 more
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An 8-T superconducting quantum interference device magnetometer

Review of Scientific Instruments, 1991
A variable-temperature (1.4–320 K) superconducting quantum interference device magnetometer, operating in magnetic fields up to 8 T, has been built. The sensitivity is 2×10−7 emu in low fields and 2×10−6 in high fields. The apparatus allows magnetization and anisotropy measurements to be performed and is entirely automated. It is of simple construction
J. C. Genna, S. Biston, J. C. Cotillard, P. Lethuillier, C. Faurin, P. Hostachy, R. Rocca-Valero, J. Roullier   +7 more
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