A broadband waveguide for protein crystallography under intense microwave fields

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2004
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Weissenborn, Ralf
Reinhardt, Tina
Hansen, Volkert
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Review of Scientific Instruments. 2004, 75(12), pp. 5253-5256. Available under: doi: 10.1063/1.1813771
Zusammenfassung

We present a slab-line waveguide whose geometry is optimized for wide-angle x-ray diffraction (XRD) experiments on protein crystals during irradiation with intense microwave fields. Characterization of the waveguide transmission and reflectivity (using time-domain reflectometry) and of the electric field distribution inside the waveguide (using finite-difference time-domain calculations) shows that the present device has a broad bandwidth from below 0.5 to 18 GHz, allowing one to perform frequency-dependent XRD studies with a well-defined transverse mode structure and negligible reflection losses. As shown with a specific example, our device provides a simple way to couple microwave irradiation experiments with high-resolution x-ray diffraction measurements from millimeter-size crystalline samples. The present design might prove useful for systematic studies of microwave effects on protein structure and dynamics.

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ISO 690WEISSENBORN, Ralf, Tina REINHARDT, Volkert HANSEN, Georg MARET, Thomas GISLER, 2004. A broadband waveguide for protein crystallography under intense microwave fields. In: Review of Scientific Instruments. 2004, 75(12), pp. 5253-5256. Available under: doi: 10.1063/1.1813771
BibTex
@article{Weissenborn2004broad-5301,
  year={2004},
  doi={10.1063/1.1813771},
  title={A broadband waveguide for protein crystallography under intense microwave fields},
  number={12},
  volume={75},
  journal={Review of Scientific Instruments},
  pages={5253--5256},
  author={Weissenborn, Ralf and Reinhardt, Tina and Hansen, Volkert and Maret, Georg and Gisler, Thomas}
}
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