title: Measurements of magnetic field stability in inhomogeneous magnetic fields at low temperature.
abstract: 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 (3)He, 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.
authors.affiliation: CEA, DSM, IRAMIS, SIS2M, LSDRM, CEA Saclay, Gif-sur-Yvette, France. cedric.hugon@cea.fr
authors.forename: Cedric
authors.initials: C
authors.lastname: Hugon
authors.forename: Jacques-Francois
authors.initials: JF
authors.lastname: Jacquinot
authors.forename: Dimitris
authors.initials: D
authors.lastname: Sakellariou
mesh_terms: D016880:Anisotropy; D003080:Cold Temperature; D004574:Electromagnetic Fields; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006371:Helium / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods*; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity; D012996:Solutions / Q000737:chemistry
chemical_list: D012996:Solutions; D006371:Helium