Recent Advances in Dynamic Nuclear Polarization Targets

A new dynamic nuclear polarization (DNP) target has been constructed at the University of New Hampshire that is being used to develop new tensor enhancement techniques for upcoming experiments at Jefferson lab to measure the tensor polarized structure function b₁ and the quasi-elastic tensor asymmetry A_zz. This target utilizes a novel solid-state microwave system for driving both vector and tensor polarization enhancement and is capable of simultaneous EPR measurements, a recently constructed 1K liquid helium evaporative refrigerator, multiple NMR systems for polarization measurements, and 3D printed target ladders. Additionally, new methods for creating polarizable material utilizing slow-freezing techniques are being developed. An overview of these advances and experimental opportunities for this target will be presented.