Development of Polarized ³He Target for Super Bigbite Spectrometer (SBS) Program at Jefferson Lab

With the primary goal of enabling strong discrimination between sophisticated models of the nucleon and imposing critical constraints on the parameterization of generalized parton distributions (GPDs), the Super Bigbite Spectrometer (SBS) physics program at Jefferson Lab (JLab) has focused on determining the elastic nucleon form factors at high momentum transfer (Q²). To extract the neutron electric form factor GEn at high Q² with high accuracy, the SBS GEn experiment (E12-09-016) has employed the double-polarization technique, where a polarized electron beam collides with a high luminosity polarized ³He target. A significant innovation has been implemented in the development and operation of the polarized ³He target, resulting in a figure of merit increased threefold compared to polarized ³He target used in the previous electron-scattering experiment. Discussions on polarized ³He targets used for SBS GEn experiment running from October 2022 to March 2023, as well as plan for developing a new generation of the polarized ³He target for the future SBS SIDIS experiment (Semi-Inclusive pion and kaon electro-production in Deep Inelastic Scattering regime), will be presented.