Multifrequency probe for pulsed EPR and ENDOR spectroscopy

Nikolai I. Avdievich, Gary J. Gerfen

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The design, construction, and performance of a multifrequency pulsed EPR and ENDOR probe for use at cryogenic temperatures are described. Interchangeable resonators based on a folded strip line design allow variation of the resonance frequency over a range of 5-11 GHz. Variable coupling to the resonator is achieved capacitively via a simple mechanical adjustment which is thermally and mechanically stable. The entire assembly is robust and easily fabricated. Common methods of analyzing the resonator parameters such as the Q-factor and coupling coefficient are discussed quantitatively. Probe performance data and multifrequency pulsed ENDOR spectra are presented.

Original languageEnglish (US)
Pages (from-to)178-185
Number of pages8
JournalJournal of Magnetic Resonance
Issue number2
StatePublished - 2001

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Nuclear and High Energy Physics
  • Condensed Matter Physics


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