1. The 12 GeV equipment Hall D – Hall D – GLUEx detector for photoproduction experiments Hall B – Large acceptance detector CLAS12 for high luminosity measurements (10 35 cm -2 s -1 ) Hall A – Hall A – High Resolution Spectrometers and new multipurpose large acceptance detectors Hall C – Hall C – Super High Momentum Spectrometer (SHMS) and dedicated equipment ✴ short range correlations, form factors, and future new experiments: SOLID, MOELLER, SBS ✴ precise determination of valence q properties in nucleons and nuclei ✴ Understanding nucleon structure via GPDs and TMDs and hadron spectroscopy ✴ explore origin of confinement by studying hybrid mesons

3. Front Tracker GEM construction process Electronics based on APV25 chip Radiation Tolerant Components in FEC VME64x compliant readout Modular Stretching Compressing (uniform gluing, remove air from glue and contact surfaces) Sanità/BA: Test and characterization by cosmics GE used in Olympus Foils from CERN Revision Noise level ~ 10 ADC unit (Analysis example) Gluing Frame Integrate electronics, gas pipes, HV...) CT/Clean Room

4. Primi moduli GEM finali 40x50 cm 2 4 BigGEM in solenoid Small GEM, ref. BigGEM as 2xGEM, ref. X y Beam Profile 2x2 small scintillators as telescope for trigger One big GEM in solenoid open space One big GEM beyond the magnet as reference tracking Basically all final components under test (big GEMs, electronics, gas system, cabling...) Analysis in progress --- Solenoid Clean hits vs time x y

5. SBS Tracker: summary Participants: INFN/BA – gas system and test INFN/CT – GEM assembling, mechanics, test, analysis INFN/GE – electronics design INFN/ISS – design, test, analysis and coordination INFN/RM1 – Silicon tracker JLab, Glasgow, UvA, Ruthers, UNH, CMU – SBS collaboration Funding: (prototyping and realization) 1 M$ Status: most of the components procured or ordered; GEM assembling underway; characterization in progress. Expected installation 2015 (delayed by JLab/HallA schedule) Note: project delayed by ~ 1 year – due mainly to foil delivery and first quality check failures. Do not affect JLab plan!