Spin Transport of Polarized Helium-3 Atoms.

The electric dipole moment of the neutron, a property that has never been observed, would predict the violation of time reversal symmetry necessary to explain the existence of matter in our universe.  A vital component of our experiment measuring this exotic property is an atomic beam of polarized Helium-3, which serves as a co-magnetometer in the precession chamber.  Recent changes to simplify the geometry of our experimental apparatus have affected the magnetics of injecting polarized Helium-3 into the collection volume.  We present a redesigned tapered magnetic field for this new optimized design.  As the Helium-3 atoms travel ballistically along the tapered B field, they precess at the Larmor frequency and adiabatically follow the direction of the field.  Our goal is to taper from high field to low field as quickly as possible, while keeping field distortions low enough to maintain the polarization.  We also present our Monte Carlo simulation which tracked the spin precision of individual Helium-3 atoms to optimize the magnetic coil performance