Flow measurement by "Doppler shift" nuclear magnetic resonance

Zhiyue Wang, John S. Leigh

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

A nuclear magnetic resonance (NMR) 1D flow measurement technique is described and demonstrated experimentally. The technique uses a "meander coil" in the NMR probe for the radio frequency (rf) excitation and detection. The meander coil gives rise to highly inhomogeneous B1 field, whose direction varies linearly as a function of spatial coordinates. The detected NMR signal acquires a frequency shift which is proportional to the speed of the nuclear spin. In a sense, this frequency shift is similar to the Doppler shift. The flow speed can be measured by one free induction decay (FID) without applying B0 field gradient.

Original languageEnglish (US)
Pages (from-to)3396-3398
Number of pages3
JournalThe Journal of Chemical Physics
Volume90
Issue number6
DOIs
StatePublished - Jan 1 1989

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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