First Tests of the New Longitudinally Polarized Target for CLAS12

The Run Group C suite of experiments will measure multiple spin-dependent observables by scattering the energy-upgraded 11 GeV electron beam from longitudinally polarized nucleon targets inside the CLAS12 spectrometer in Hall B at Jefferson Lab. The dynamically polarized target built for these experiments has been extensively tested in the JLab Target Lab using an auxiliary 5 T magnet. We will report on the operational experience with the target, and the benchmarks achieved so far using various polarizable materials with the complete target setup. Our results show that all target components work well and that the project is on track for the scheduled experiment that will run during most of the year 2022.