Speaker
Description
We describe the operation of a dynamically polarized nuclear (DNP) target facility and helium recapture system at the University of New Hampshire. Polarization enhancement is driven in a 5 Tesla superconducting magnet by a solid-state 140 GHz mm-wave source with quasi-optics transmission and a low-loss overmodal waveguide that is insensitive to magnetic fields. We have dynamically enhanced the vector and tensor polarization of deuterons in a variety of doped materials. A VME-based QMeter system is used to measure polarization, with the system normalization determined both by measuring the thermal equilibrium response and via line shape analysis of the NMR spectra. This facility supports the Jefferson Lab experimental program to explore tensor structure functions in DIS, and the tensor asymmetry in quasi-elastic and SIDIS experiments.
