Cryogenic 35 GHz pulse ENDOR probehead accommodating large sample sizes: Performance and applications

Maria Grazia Santangelo, Patrik Leger, Gunnar Jeschke, Inés García-Rubio, François Diederich, Rolf Schuhmann, Henry Dube, René Tschaggelar, Besnik Kasumaj, Jeffrey Harmer, Jörg Forrer, Maria Grazia Santangelo

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The construction and performance of a cryogenic 35 GHz Pulse electron nuclear double resonance (ENDOR) probehead for large samples is presented. The resonator is based on a rectangular TE102 Cavity in which the radio frequency (rf) B-2-field is generated by a two turn saddle ENDOR coil crossing the resonator along the sample axis with minimal distance to the sample tube. An rf power efficiency factor is used to define the B-2-field strength per square-root of the transmitted rf power over the frequency range 2-180 MHz. The distributions of the microwave B-1- and E-1-field, and the rf B-2-field are investigated by electromagnetic field calculations. All dielectrics, the sample tube, and coupling elements are included in the Calculations. The application range of the probehead and the advantages of using large sample sizes are demonstrated and discussed on a number of paramagnetic samples containing transition metal ions.
Lingua originaleEnglish
pagine (da-a)81-87
Numero di pagine8
RivistaJournal of Magnetic Resonance
Stato di pubblicazionePublished - 2009


All Science Journal Classification (ASJC) codes

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

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Santangelo, M. G., Leger, P., Jeschke, G., García-Rubio, I., Diederich, F., Schuhmann, R., Dube, H., Tschaggelar, R., Kasumaj, B., Harmer, J., Forrer, J., & Santangelo, M. G. (2009). Cryogenic 35 GHz pulse ENDOR probehead accommodating large sample sizes: Performance and applications. Journal of Magnetic Resonance, 200, 81-87.