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  4. Radio frequency pulse marking of nuclear magnetization for magnetic flow metering: The impact of the flow profile
 
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2024
Journal Article
Title

Radio frequency pulse marking of nuclear magnetization for magnetic flow metering: The impact of the flow profile

Abstract
This study explores how magnetization manipulation occurs in a flowing medium over a pipe geometry using nuclear magnetic resonance methods. In particular, the experimental conditions on radio frequency pulsing and the signal detection are studied in an ultra-low frequency regime of a few kilohertz. An analytical model of the magnetization preparation is presented, which calculates the magnetization distribution of an excited flowing segment. The effective flip angle distribution is mapped to simulate the temporal development of the magnetization in the segment. The simulation results are compared to the experimental data from a flow metering setup. As a result, the quantitative impact of the flow profile on the magnetic signal is shown.
Author(s)
Schmieder, Leonhard  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Koss, Peter  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Kühnemann, Frank  
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Bock, Michael
Universitätsklinik Freiburg
Journal
Journal of applied physics  
DOI
10.1063/5.0204641
Language
English
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Keyword(s)
  • Magnetic flow metering

  • Nuclear magnetic resonance

  • Radio frequency pulsing

  • Signal detection

  • Magnetization

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