Speaker
Description
The Systematic and Operations Studies (SOS) for the neutron electric dipole moment (nEDM) experiment at the Spallation Neutron Source (SNS) will measure the trajectory correlation functions of $^{3}He$ and neutrons in order the determine the expected frequency shift from the geometric phase effect in the nEDM@SNS experiment. To this end the SOS apparatus will utilize Metastability Exchange Optical Pumping (MEOP) to polarize $^{3}He$ to 80% polarization at room temperature. The $^{3}He$ is then injected into measurement cell inside the cryovessel where the experiment is performed with concentrations of $^{3}He$ as low as $10^{-10}$ and a temperature of 0.4 K. We describe the polarization and injection system as well as report on results from tests of the MEOP system, simulations of $^{3}He$ injection, and our calculations of trajectory correlation functions.
