Dependence of NMR noise line shapes on tuning, matching, and transmission line properties

Eli Bendet-Taicher, Norbert Müller, Alexej Jerschow

Research output: Contribution to journalArticle

Abstract

The tuning and matching conditions of rf circuits, as well as the properties of the transmission lines connecting these to the preamplifier, have direct consequences for NMR probe sensitivity and as for the optimum delivery of rf power to the sample. In addition, tuning/matching conditions influence radiation damping effects, which manifest themselves as fast signal flip-back and line broadening effects, and can lead to concentration-dependent frequency shifts. Previous studies have also shown that the appearance of spin-noise and absorbed circuit noise signals heavily depended on tuning settings. Consequently, all these phenomena are linked together. The mutual connections and interdependences of these effects are highlighted and reviewed here.

Original languageEnglish (US)
Pages (from-to)1-11
Number of pages11
JournalConcepts in Magnetic Resonance Part B: Magnetic Resonance Engineering
Volume44
Issue number1
DOIs
StatePublished - Feb 1 2014

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Keywords

  • NMR noise
  • Transmission line

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging
  • Spectroscopy
  • Physical and Theoretical Chemistry

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