Metastability Exchange Optical Pumping of Helium-3 at High Pressures and 1.5 T: Comparison of two Optical Pumping Transitions

摘要

At low magnetic field, metastability exchange optical pumping of helium-3 isknown to provide high nuclear polarizations for pressures around 1 mbar. In arecent paper, we demonstrated that operating at 1.5 T can significantly improvethe results of metastability exchange optical pumping at high pressures. Here,we compare the performances of two different optical pumping lines at 1.5 T,and show that either the achieved nuclear polarization or the production ratecan be optimized.