The 12 GeV equipment

Hall D – GLUEx detector for photoproduction experiments

Hall B – Large acceptance detector CLAS12 for high luminosity measurements (1035cm-2s-1)

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

✴ Understanding nucleon structure via GPDs and TMDs and hadron spectroscopy

✴ explore origin of confinement by studying hybrid mesons

Front Tracker GEM construction process

Electronics based on APV25 chipRadiation Tolerant Components in FECVME64x compliant readoutModular

Stretching

Compressing (uniform gluing, remove air from glue and contact surfaces)

Sanità/BA: Test and characterization by cosmics

GE

used in Olympus

Foils from CERNRevision

Noise level ~ 10 ADC unit

(Analysis example)

GluingFrame

Integrate electronics, gas pipes, HV ...)

CT/Clean Room

Primi moduli GEM finali 40x50 cm2

4

BigGEM in solenoid

Small GEM, ref.

BigGEM as 2xGEM, ref.

X y

Beam Profile

2x2 small scintillators as telescope for triggerOne big GEM in solenoid open spaceOne big GEM beyond the magnet as reference

trackingBasically all final components under test (big

GEMs, electronics, gas system, cabling ...)

Analysis in progress ---

Solenoid

Clean hits vs time x

y

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!