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pro vyhledávání: '"Kurt Weyand"'
Autor:
Kurt Weyand
Publikováno v:
International Journal of Applied Electromagnetics and Mechanics. 13:195-202
Publikováno v:
2004 Conference on Precision Electromagnetic Measurements.
For the calibration of magnetic instruments a DC current source controlled by nuclear magnetic resonance (NMR) has been developed for currents in the range from 0.3 to 1 A. Depending on the absorption line-width of the NMR sample a resolution of less
Autor:
Kurt Weyand
Publikováno v:
Metrologia. 42:01006-01006
The delegates of the CCEM discussion meeting on international comparisons in magnetism recommended in May 2000 in Sydney that a worldwide intercomparison of magnetic flux density by means of a transfer standard coil should be proposed in addition to
Autor:
Kurt Weyand
Publikováno v:
Metrologia. 42:01007-01007
With respect to the measurements of the dc coil constant, three institutes applying nuclear magnetic resonance methods, and thus providing the lowest uncertainty budgets, participated in both the EUROMET 466 comparison and the the CCEM.M-K1 compariso
Autor:
Kurt Weyand
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. :167-173
A γp,low experiment based on a novel method of determining the coil constant has yielded preliminary results. The coil constant is found by measuring the flux profile along the axis of the windings. When the NMR experiment is performed in the free p
Autor:
Kurt Weyand, Gerd-Dietmar Willenberg
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. :275-279
The error sources which have proven to be dominant in our previous γ′ p experiments are discussed and improvements in the experimental setup to reduce their influence on the coil-constant determination below the 1-ppm level are described. In parti
Autor:
Kurt Weyand
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 29:324-328
A dc-current control using a commercial-type of RF superconducting quantum interference device (SQUID) system has been developed for high-resolution nuclear magnetic resonance (NMR) experiments. The control unit is a superposed regulator designed to
Autor:
Kurt Weyand
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. :267-270
In order to determine the ac properties of laminated magnetic-core materials, a digital assembly has been developed to measure the mean half-period value nearly independent of frequency. Conventional integrating digital voltmeters are unsuitable for
Autor:
Kurt Weyand
Publikováno v:
2004 Conference on Precision Electromagnetic Measurements; 2004, p26-27, 2p
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