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.