Conveners
Polarized Solid Targets II
- Josh Pierce (Oak Ridge National Laboratory)
The University of New Hampshire polarized target lab uses dynamic nuclear polarization to achieve high tensor polarization in solid deuterated target material, such as ND3 and deuterated alcohols. This system is comprised by a number of subsystems including a 1 K liquid helium refrigerator, a solid state microwave emitter, and a superconducting magnet. To mount the target material inside the...
This talk concerns the installation of a new helium recapture and reliquefaction system, consisting of a gas bag, manifold, cooling chiller, purifier, high pressure compressor and cylinder banks, in the dynamic nuclear polarized target lab at University of New Hampshire. This new system has the capability to improve the efficiency of target polarizations runs by recycling our cryogenic helium...
The use of tensor targets enables access to a set of observables that allow a deeper understanding of deuterium, the lightest composite nucleus. Currently, there is significant interest within the community in studying some of these observables, with experiments already approved and new physics proposals in development. The common technique for enhancing vector polarization is Dynamic Nuclear...
Understanding the NMR lineshape of solid deuterated materials has become of interest due to upcoming measurements of the tensor polarized observables $A_{zz}$ and $b_1$ at Jefferson Lab. This talk will describe a new computational model based on simple spin-flip transition calculations that accurately describes the NMR spectra of deuterated materials that have undergone both dynamic nuclear...
To determine the spin polarization of deuterons, nuclear magnetic resonance (NMR) is used. This is necessary for polarized targets, such as for the upcoming Azz and b1 experiment at Jefferson Lab. NMR measures the impedance of a solenoid around a deuterated sample. Although the impedance is a complex value, conventionally only the real part of the impedance has been used for this purpose....
Solid polarized targets are a crucial tool used in scattering experiments to investigate different properties of the nucleon. The equipment used to produce, measure, and maintain conditions for the polarized material is complex in comparison to non polarized targets. This, in combination with the frequency of polarized experiments run at Jefferson Lab, limits the opportunity to refine and...
