title: Dielectric Resonator forKa-Band Pulsed EPR Measurements at Cryogenic Temperatures: Probehead Construction and Applications.
abstract: The construction and performance of aKa-band pulsed electron paramagnetic resonance (EPR) cryogenic probehead that incorporates dielectric resonator (DR) is presented. We demonstrate that the use of DR allows one to optimize pulsed double electron-electron resonance (DEER) measurements utilizing large resonator bandwidth and large amplitude of the microwave fieldB1. In DEER measurements of Gd-based spin labels, use of this probe finally allows one to implement the potentials of Gd-based labels in distance measurements. Evidently, this DR is well suited to any applications requiring largeB1-fields and resonator bandwidths, such as electron spin echo envelope modulation spectroscopy of nuclei having low magnetic moments and strong hyperfine interactions and double quantum coherence dipolar spectroscopy as was recently demonstrated in the application of a similar probe based on an loop-gap resonator and reported by Forrer et al. (J Magn Reson 190:280, 2008).
authors.affiliation: Department of Chemistry and Biochemistry, University of Arizona, 1306 E. University Blvd, Tucson, AZ 85721-0041, USA.
authors.forename: A
authors.initials: A
authors.lastname: Raitsimring
authors.forename: A
authors.initials: A
authors.lastname: Astashkin
authors.forename: J H
authors.initials: JH
authors.lastname: Enemark
authors.forename: A
authors.initials: A
authors.lastname: Blank
authors.forename: Y
authors.initials: Y
authors.lastname: Twig
authors.forename: Y
authors.initials: Y
authors.lastname: Song
authors.forename: T J
authors.initials: TJ
authors.lastname: Meade