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A CW and pulse EPR spectrometer operating at 122 and 244 GHz using a quasi-optical bridge and a cryogen-free 12 T superconducting magnet

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Abstract

A high-field continuous-wave (CW) and pulse electron paramagnetic resonance spectrometer operating at 122 and 244 GHz is described. The instrument is based on a millimeter-wave bridge built from quasi-optical components. To improve the sensitivity, a cryo-cooled detector/mixer is used. The magnetic field is generated using a cryogen-free superconducting 12 T magnet (warm bore, 88 mm) equipped with a helium-flow cryostat for sample cooling. The advantages of this spectrometer are described and first results (obtained in CW mode) on different types of samples at 122 and 244 GHz are presented. The extensions to pulse operation as well as double resonance techniques (electron-electron and electron-nuclear) are briefly discussed.

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Authors and Affiliations

  1. Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, 45470, Mülheim an der Ruhr, Germany

    E. Reijerse, P. P. Schmidt, G. Klihm & W. Lubitz

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  1. E. Reijerse
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  2. P. P. Schmidt
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  3. G. Klihm
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  4. W. Lubitz
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Reijerse, E., Schmidt, P.P., Klihm, G. et al. A CW and pulse EPR spectrometer operating at 122 and 244 GHz using a quasi-optical bridge and a cryogen-free 12 T superconducting magnet. Appl. Magn. Reson. 31, 611–626 (2007). https://doi.org/10.1007/BF03166606

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  • DOI: https://doi.org/10.1007/BF03166606

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