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The Umbella high-frequency EPR facility

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Abstract

The Umbella high-frequency electron paramagnetic resonance (EPR) facility is a part of the Nijmegen High Field Magnet Laboratory with special emphasis on multifrequency EPR for chemical and biological applications. At present the facility has various solid-state sources available for the frequency range between 95 and 400 GHz, combined with magnetic fields up to 30 T. For frequencies above 400 GHz a far-infrared laser is used. With superheterodyne detection techniques a typical dynamical range of 130 dB is obtained, with single-mode resonators, oversized cylindrical and Fabry-Perot resonators. Some examples will be shown to demonstrate the power of multifrequency EPR in high-spin systems.

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Authors and Affiliations

  1. Research Institute for Materials and High Field Magnet Laboratory, University of Nijmegen, Nijmegen, The Netherlands

    P. J. M. van Bentum, E. van der Horst & M. E. J. Boonman

  2. Department for Molecular Spectroscopy, University of Nijmegen, Nijmegen, The Netherlands

    A. Priem, W. R. Hagen & E. J. Reijerse

  3. ABmm, Paris, France

    M. Gross & P. Goy

  4. Istituto di Fisica Atomica e Molecolare del Consiglio Nazionale delle Ricerche, Ghezzano, Pisa, Italy

    M. Martinelli & A. Colligiani

Authors
  1. P. J. M. van Bentum
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  2. E. van der Horst
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  3. M. E. J. Boonman
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  4. A. Priem
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  5. W. R. Hagen
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  6. E. J. Reijerse
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  7. M. Gross
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  8. P. Goy
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  9. M. Martinelli
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  10. A. Colligiani
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van Bentum, P.J.M., van der Horst, E., Boonman, M.E.J. et al. The Umbella high-frequency EPR facility. Appl. Magn. Reson. 19, 479–484 (2000). https://doi.org/10.1007/BF03162391

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  • DOI: https://doi.org/10.1007/BF03162391

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