Commissioning of the Gas Electron Multiplier System for the E12-17-004 Neutron Polarimeter

A large set of Gas Electron Multiplier (GEM) detectors is being commissioned for a novel neutron polarimeter based on elastic and charge-exchange recoil proton detection in experiment E12-17-004 under preparation for the Super-Bigbite Spectrometer (SBS) program at Jefferson Lab. The status of the commissioning activity and performance of the GEM detectors will be presented.