Rutile dielectric loop-gap resonator for X-band EPR spectroscopy of small aqueous samples.

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ID: 42194
2019
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Ranked #805 of 875 articles by views in journal of magnetic resonance (san diego, calif : 1997)

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Abstract
The performance of a metallic microwave resonator that contains a dielectric depends on the separation between metallic and dielectric surfaces, which affects radio frequency currents, evanescent waves, and polarization charges. The problem has previously been discussed for an X-band TE cylindrical cavity resonator that contains an axial dielectric tube (Hyde and Mett, 2017). Here, a short rutile dielectric tube inserted into a loop-gap resonator (LGR) at X-band, which is called a dielectric LGR (dLGR), is considered. The theory is developed and experimental results are presented. It was found that a central sample loop surrounded by four "flux-return" loops (i.e., 5-loop-4-gap) is preferable to a 3-loop-2-gap configuration. For sufficiently small samples (less than 1 µL), a rutile dLGR is preferred relative to an LGR both at constant Λ (B/P) and at constant incident power. Introduction of LGR technology to X-band EPR was a significant advance for site-directed spin labeling because of small sample size and high Λ. The rutile dLGR introduced in this work offers further extension to samples that can be as small as 50  nL when using typical EPR acquisition times.
Reference Key
mett2019rutilejournal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Mett, Richard R;Sidabras, Jason W;Anderson, James R;Klug, Candice S;Hyde, James S;
Journal journal of magnetic resonance (san diego, calif : 1997)
Year 2019
DOI
S1090-7807(19)30224-1
URL
Keywords Keywords not found

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