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Abstract #4027

Probehead design for multi-photon NMR induced homonuclear continuous RF decoupling

Christoph Michael Schildknecht1, David Otto Brunner1, and Klaas Paul Pruessmann1

1Institute for Biomedical Engineering, ETH Zurich and University of Zurich, Zurich, Switzerland

Spectra of strongly coupled nuclear systems are frequently obtained by fast magic angle spinning. In biological samples, this is often not feasible, leaving homonuclear RF decoupling as the only alternative. This approach requires fast nutation while receiving a spectrum from the same type of nuclei. This can be achieved by multi-photon excitation, albeit at the expense of high power densities. In this work, we present a construction approach for such probe heads maximizing the excitation efficiency and demonstrating nutations above 20kHz over extended periods of time.

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