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Abstract #1506

Design & Performance of a Multi-Sample Dissolution Dynamic Nuclear Polarization Setup

Michael Batel1, Marcin Krajewski2, Kilian Weiss2, Oliver With1, Alexander Dpp1, Andreas Hunkeler1, Martin Gimersky3, Matthias Ernst1, Sebastian Kozerke2

1Laboratory of Physical Chemistry, ETH Zrich, Zrich, Switzerland; 2Institute for Biomedical Engineering, University & ETH Zrich, Zrich, Switzerland; 3Laboratory for Electromagnetic Fields and Microwave Electronics, ETH Zrich, Zrich, Switzerland

A multi-sample dissolution DNP system compatible with commercial wide-bore magnets is presented. The system is designed to accommodate up to six samples on a revolver-style sample changer permitting exchange at liquid Helium temperatures. The system includes EPR and NMR capabilities for monitoring purposes. 13-C DNP enhancements for pyruvic acid with the trityl radical OX63 are reported. In the solid-state 21% polarization is reached and in the dissolved liquid-state the enhancement factor measured is more than 12000 at 7 T.