Precise Measurement of Magnetic Field Gradients from Free Spin Precession Signals of $^{3}$He and $^{129}$Xe Magnetometers
| Autor: | Andreas Offenhäusser, Olivier Grasdijk, M. Repetto, Michael Doll, Werner Heil, S. Zimmer, Yuri Sobolev, S. Karpuk, Ulrich Schmidt, Hans-Joachim Krause, Lorenz Willmann, F. Allmendinger, Klaus Jungmann, Peter Blümler, K. Tullney |
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| Přispěvatelé: | Precision Frontier |
| Rok vydání: | 2016 |
| Předmět: |
Physics - Instrumentation and Detectors
POLARIZATION Field (physics) Magnetometer Atomic Physics (physics.atom-ph) chemistry.chemical_element FOS: Physical sciences DIFFUSION-COEFFICIENTS 01 natural sciences Physics - Atomic Physics 010305 fluids & plasmas law.invention XENON Xenon law SYSTEMS 0103 physical sciences ddc:530 010306 general physics Spin (physics) EXCHANGE Helium Physics MIXTURES NOBLE-GAS Instrumentation and Detectors (physics.ins-det) Polarization (waves) Atomic and Molecular Physics and Optics Magnetic flux chemistry XE Precession Atomic physics HELIUM |
| Zdroj: | The European physical journal / D 71(4), 98 (2017). doi:10.1140/epjd/e2017-70505-4 European Physical Journal D, 71(4):98. SPRINGER |
| ISSN: | 1434-6060 |
| DOI: | 10.48550/arxiv.1608.01830 |
| Popis: | We report on precise measurements of magnetic field gradients extracted from transverse relaxation rates of precessing spin samples. The experimental approach is based on the free precession of gaseous, nuclear spin polarized 3He and 129Xe atoms in a spherical cell inside a magnetic guiding field of about 400 nT using LT C SQUIDs as low-noise magnetic flux detectors. The transverse relaxation rates of both spin species are simultaneously monitored as magnetic field gradients are varied. For transverse relaxation times reaching 100 h, the residual longitudinal field gradient across the spin sample could be deduced to be |∇ B z | = (5.6 ± 0.2) pT/cm. The method takes advantage of the high signal-to-noise ratio with which the decaying spin precession signal can be monitored that finally leads to the exceptional accuracy to determine magnetic field gradients at the sub pT/cm scale. |
| Databáze: | OpenAIRE |
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