Measurements of magnetic field stability in inhomogeneous magnetic fields at low temperature

We present an original method for field stability measurements in a bath of liquid helium. This method is used to validate the power supply of a superconductive magnet operating in driven mode. The experiment consists in the measurement of the NMR signal of a sample of liquid 3He, placed inside the...

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Bibliographic Details
Published in:Journal of magnetic resonance (1997) 2010, Vol.202 (1), p.1-8
Main Authors: Hugon, Cedric, Jacquinot, Jacques-Francois, Sakellariou, Dimitris
Format: Article
Language:English
Subjects:
Anisotropy
Cold Temperature
Electromagnetic Fields
Equipment Design
Equipment Failure Analysis
Field stability
Helium - chemistry
Inductive coupling
Inhomogeneous field
Liquid 3He
Magnetic Resonance Spectroscopy - methods
NMR
Radiometry - instrumentation
Radiometry - methods
Reproducibility of Results
Scattering, Radiation
Sensitivity and Specificity
Solutions - chemistry
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Summary:We present an original method for field stability measurements in a bath of liquid helium. This method is used to validate the power supply of a superconductive magnet operating in driven mode. The experiment consists in the measurement of the NMR signal of a sample of liquid 3He, placed inside the field of a test magnet driven by a power supply. The homogeneity of the magnet is a strongly limiting factor for measurements but through the use of an inductively coupled microcoil and careful signal processing, a precision of 5.5 ppm was achieved.
ISSN:1090-7807
1096-0856
DOI:10.1016/j.jmr.2009.08.005