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Suppression of Static Magnetic Field in Diffusion Measurements of Heterogeneous Materials
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SYSNO ASEP 0336699 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Suppression of Static Magnetic Field in Diffusion Measurements of Heterogeneous Materials Author(s) Gescheidtová, E. (CZ)
Bartušek, Karel (UPT-D) RID, ORCID, SAINumber of authors 2 Source Title PIERS 2009 Beijing: Progess in Electromagnetics Research Symposium - Proceedings. - Cambridge : Electromagnetic Academy, 2009 / Kong J. A. - ISSN 1559-9450 - ISBN 978-1-934142-08-0 Pages s. 1114-1118 Number of pages 5 s. Action Progress in Electromagnetics Research Symposium 2009 Beijing Event date 23.04.2009-27.04.2009 VEvent location Beijing Country CN - China Event type WRD Language eng - English Country US - United States Keywords NMR-diffusion ; simulated echo ; background gradient suppression Subject RIV JA - Electronics ; Optoelectronics, Electrical Engineering R&D Projects GA102/07/0389 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20650511 - UPT-D (2005-2011) UT WOS 000268101100232 DOI 10.2529/PIERS080722090039 Annotation The paper describes a magnetic resonance (MR) method for establishing the diffusion coefficients in heterogeneous materials. The pulsed field gradient stimulated-echo methods have a reduced coupling between the applied magnetic field gradient and a constant internal magnetic field gradient caused by different susceptibilities throughout the sample. When studying systems where it is necessary to keep the duration of the pulse sequence at a minimum or to study diffusion as a function of observation time, the spin-echo method should be chosen. The basic idea is to acquire the spin echo amplitude with pulsed field gradient of opposite signs and to subtract in a suitable way the NMR signals measured. The measuring method and the digital signal processing enable eliminating the effect of static magnetic field on the accuracy of measuring. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2010
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