Title :
Maintenance and dissemination of the magnetic field unit at PTB
Author_Institution :
Phys. Tech. Bundesanstalt, Braunschweig, Germany
Abstract :
Based on the value of 1 mT as provided as SI unit for a /spl gamma//sub p/ experiment about 20 years ago, the flux density scale as currently maintained at PTB over a range from 20 /spl mu/T to 2 T by different NMR setups, and the measuring methods used to disseminate the unit in the case of DC- and AC-fields are presented.
Keywords :
calibration; gyromagnetic ratio; magnetic field measurement; measurement standards; nuclear magnetic resonance; units (measurement); 1 mT; 20 muT to 2 T; AC-fields; DC-fields; NMR setup; SI unit; calibration; coils; dissemination; flux density scale; free precession; fundamental constants; magnetic field unit; maintenance; proton gyromagnetic ratio; spin-spin relaxation time; Calibration; Coils; Density measurement; Frequency measurement; Instruments; Magnetic field measurement; Magnetic fields; Nuclear magnetic resonance; Protons; Resonant frequency;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2000 Conference on
Conference_Location :
Sydney, NSW, Australia
Print_ISBN :
0-7803-5744-2
DOI :
10.1109/CPEM.2000.851113
