2000 character limit reached
MEOP based 3He polarization and injection system for experiments below 1 K (2411.07197v1)
Published 11 Nov 2024 in physics.ins-det
Abstract: Metastability exchange optical pumping (MEOP) is a widely used technique for producing polarized ${3}$He. In connection with an experiment to search for the electric dipole moment of the neutron (nEDM) we have built a MEOP based ${3}$He polarization and injection system to prepare 80 % polarized ${3}$He at room temperature which will be injected into a ~400 mK measurement cell filled with superfluid ${4}$He. We describe the polarization and injection system, which is designed to allow for final concentrations of $10{-8}-10{-10}$ of 80 % polarized ${3}$He in the superfluid filled measurement cell. Only $\approx0.72\%$ polarization loss due to gradients is expected during injection