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The 12 GeV equipment

The 12 GeV equipment. Hall A – High Resolution Spectrometers and new multipurpose large acceptance detectors. Hall C – Super High Momentum Spectrometer (SHMS) and dedicated equipment. short range correlations, form factors, and future new experiments: SOLID, MOELLER, SBS.

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The 12 GeV equipment

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  1. The 12 GeV equipment Hall A – High Resolution Spectrometers and new multipurpose large acceptance detectors 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 Hall D – GLUEx detector for photoproduction experiments Hall B – Large acceptance detector CLAS12 for high luminosity measurements (1035cm-2s-1) • Understanding nucleon structure via GPDs and TMDs and hadron spectroscopy • explore origin of confinement by studying hybrid mesons

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

  3. Primi moduli GEM finali 40x50 cm2 Solenoid 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 --- Beam Profile BigGEM in solenoid x X y Clean hits vs time Small GEM, ref. y BigGEM as 2xGEM, ref.

  4. 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!

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