Title
High frequency single-mode resonators for EPR spectroscopy enabling rotations of the sample about two orthogonal axes High frequency single-mode resonators for EPR spectroscopy enabling rotations of the sample about two orthogonal axes
Author
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Chemistry
Biology
Source (journal)
Journal of magnetic resonance. - New York, N.Y.
Volume/pages
176(2005) :1 , p. 37-46
ISSN
1090-7807
ISI
000231549100005
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
A novel single-mode resonant structure which enables the rotation of the sample about two orthogonal axes is investigated in view of electron paramagnetic resonance applications. The proposed solution is based on cylindrical nonradiative resonators laterally loaded by the sample holder. The resulting structure can still operate in nonradiative regime, although no longer rotationally invariant. These theoretical predictions, based on symmetry considerations, are confirmed by means of a finite element numerical modelling. Theoretical and computational results are then substantiated by experimental investigations at millimeter wavelengths. As a result, a single-mode resonator which enables all the relevant rotations of the sample is demonstrated at millimeter wavelengths for the first time. In this resonator the intensity of the microwave field on the sample and its orientation with respect to the static magnetic field can be kept constant during the rotations. Therefore, a complete characterization of anisotropic systems is possible at the highest sensitivity, without the need of split-coil magnets. Possible applications at very high frequencies are discussed. (c) 2005 Elsevier Inc. All rights reserved.
E-info
https://repository.uantwerpen.be/docman/iruaauth/6fb932/4675785.pdf
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