³He Metastability Exchange Optical Pumping at High Magnetic Field and Variable Pressure

With the recent advancements in Metastability Exchange Optical Pumping (MEOP) techniques, ³He nuclear spin polarization has been investigated using various systems at high magnetic fields (> 0.5T) and under different gas pressures. At Jefferson Lab target group, we are developing a ³He MEOP polarization system, where an adjustable-pressure cell design allows us to examine the dependency of ³He polarization on both pressure (1-267 mbar) and magnetic field (2-5T). This ongoing development aims to create a double-cell, cryogenic polarized ³He target for CLAS12 in Hall B at JLab, which features a central solenoid with a magnetic field of 5T. This presentation will discuss the current design and progress of the apparatus being tested at JLab.