9-14 September 2018
University of Ferrara
Europe/Rome timezone
23RD INTERNATIONAL SPIN SYMPOSIUM

NMR Polarization Measurements for Jefferson Lab's Solid Polarized Targets

10 Sep 2018, 17:00
20m
A9 (Polo degli Adelardi - Via Adelardi, 33)

A9

Polo degli Adelardi - Via Adelardi, 33

Parallel Sessions Polarized Ion and Lepton Sources and Targets Polarized Ion and Lepton Sources and Targets

Speaker

Dr James Maxwell (Dr.)

Description

Solid polarized targets rely on Nuclear Magnetic Resonance techniques to provide measurements of the enhanced polarization provided under Dynamic Nuclear Polarization. Upcoming polarized target experiments in Jefferson Lab's Hall B present challenging conditions which would benefit from improvements to traditional NMR techniques. For decades, JLab has relied upon Liverpool QMeters for NMR measurements, but these are aging and no longer produced. The polarized target group at Bonn has successfully produced replacement QMeters with modern components, and we are following their example, exploring new designs for both an analog and a digital QMeter system. Unlike recent experiments in Halls A and C, the new Hall B target will require external NMR coils, resulting in a weaker signal. In addition, two separate target cells will be utilized, each held at different magnetic fields, allowing them to be polarized in opposing directions, but complicating the NMR measurement. We will discuss the challenges presented by the new Hall B target, lay out plans for improvements to our NMR system, and show results of initial tests of our designs.

Primary author

Presentation Materials