The measurement of the elastic magnetic form factor of the neutron Gⁿ_M using the newly constructed "Super Bigbite Spectrometer" experimental setup at the Jefferson Lab

The 12 GeV beam upgrade of the Jefferson lab accelerator and the newly designed Super BigBite Spectrometer (SBS) in Hall-A, make possible a new generation of experiments to measure nucleon elastic electromagnetic form factors with high precision at high Q² values to over 10 GeV²/c². The very first experiment of the SBS program is the measurement of magnetic form factor of the neutron (Gⁿ_M)   using the ratio method which involves the detection of both neutron tagged, d(e,e'n) and proton tagged, d(e,e'p), quasi-elastic scattering from a deuteron target. The experiment explores several kinematic points ranging from 3.5 GeV²/c² to 13.5 GeV²/c² with beam energies going up to 11 GeV. The concept of the Super BigBite Spectrometer, which provides a large solid angle acceptance and the capability to operate at high luminosity, relies  on Gas Electron Multiplier (GEM) detector-based particle trackers. The GEM trackers will be used in both BigBite Spectrometer (the electron arm) and Super BigBite Spectrometer (the hadron arm.) This talk will give an overview of the Gⁿ_M experiment and will report on the recently completed  characterization activities of the GEM tracker layers and their performance  for the upcoming Gⁿ_M  experiment.