Physics program in Hall A for the CEBAF 12 GeV era SBS Physics Nucleon Form Factors (FFs) SIDIS, TMDs Nucleon Structures SBS detectors: Large Luminosity & moderate acceptance Independent arm (re-configurable detectors)

GEM Trackers of the Super Bigbite Spectrometer (SBS) Front Tracker (FT): INFN Roma & Catania (E. Cisbani) 6 layers (1st tracker) with an active area of 150 cm * 40 cm Each layer: vertical stack of 3 (50 cm * 40 cm) triple GEM modules Production: 18 modules Back Tracker (BT): University of Virginia (N. Liyanage) 2 * 5 layers (2nd & 3rd trackers) of an active area of 200 cm * 60 cm Each layer: vertical stack of 4 (60 cm * 50 cm) triple GEM modules Production: 40 (+ 5) modules BT layer (2nd & 3rd Trackers) FT layer (1st tracker) 60 cm * 50 cm BT Module 50 cm * 40 cm FT Module Proton arm of the SBS spectrometer in the Gep(5) configuration

Construction and Characteristics of the SBS GEM modules Prototype of the Back Tracker module Front Tracker layer with the APV25-MPD FE cards Spatial resolution Uniformity Charge sharing sx =58 mm