Conveners
Polarized Solid Targets I
- Chris Keith (Jefferson Lab)
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...
It is widely known that a solid polarized target is a powerful device for researches in spin physics, such as investigations of spin structure of nucleons, spin correlation in nuclear reactions, and precise measurements of discrete symmetries. In practical beam experiments, the solid polarized targets are limited to protons and deuterons since a relaxation time of nuclei with a large...
Magnetic resonance imaging using contrast agents is now an indispensable part of medical imaging. When these contrast agents, such as 3He gas, 13C in pyruvic acid or fluorine-labeled glucose (FDG), are used in the body, the sensitivity can be increased by 10,000 times or even more if the nuclei are dynamically polarized.
The results of the first dynamic polarization experiments of fluorine...
The University of Bonn has a long history of advancing polarized target technology. The first horizontal frozen spin dilution refrigerator with an internal holding field was pioneered there in 1993 and research in the field continues to this day. Currently, the next generation of frozen spin holding coils are being developed. This includes a paired longitudinal and transverse field arrangement...
