Dynamic nuclear polarization (DNP) is used to enhance the polarization of nuclear spins by transferring polarization from unpaired electrons via microwave irradiation . Accordingly, in the last two decades high frequency DNP has evolved as one of the most powerful and widely applicable techniques to mitigate the chronic issue of sensitivity in nuclear magnetic resonance (NMR) spectroscopy . In particular, in the recent past microwave driven DNP has been successfully applied to protein structural studies , to a variety of problems in materials science , and to applications of magnetic resonance imaging (MRI) using Corresponding author: rgg@mit.edu dissolution-DNP . Descriptions of the theoretical background of DNP can be found in review articles and one monograph .