Dynamic Nuclear Polarization with Solid-State Millimeter Waves, 3D Printed Components, and Software-Defined-Radio-based NMR
September 23, 2020
A new dynamic nuclear polarization (DNP) target system has recently come on-line at the University of New Hampshire. DNP is driven by a novel solid-state 140 GHz mm-wave source with quasi-optics transmission and low-loss ($<0.1$ dB/m) overmodal waveguide that is insensitive to magnetic fields. We have also developed a method to 3D print with Kel-F, which was used to produce target cups utilized in a recent cool-down. Polarization measurements are made and cross-compared on a Liverpool Q-meter, LANL Q-meter, and low-cost software-defined-radio based vector network analyzer.
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