Gif++ CR tracker setup G. Aielli for the RPC collaboration
Overall Layout of the CR tracker
Detailed layout: Top Tracker • Trigger and high time resolution. • 4 independent detectors area 1x0.5 m^2; Gap structure to be finalized • strips 3 cm wide; • The 1 m long strips (16 per read out panel) in all 4 RPCs • 0.5 m long strips in 2 out of 4 chambers. • # strips: 64 x 2 = 128 (20 E/channel) • Fine tracking. • One or 2 RPC 30x30 cm^2 with 1 cm strips in both direction (tot 32 + 32 strips) (X2). Centroid reconstruction in both directions. # strips: 64 (128) (60 E/channel) Fine trackers 40 cm • Y-Z readout • Y only readout 30 cm • Y-Z readout • Y only readout 30 cm 100 cm 50 cm View from bottom
Detailed layout: Bottom Tracker • Trigger and high time resolution: • One chamber 1x0.5 m2 as for the top tracker: strips: 16 + 32 = 48 • Fine tracking: 1 chamber 30x30 cm2 as in the previous point. # strips: 64 (60 E/channel) • Underground detector • One doublet chambers: size 2.8 x 2.4 (=2x1.2) m2 (two chambers; bi-dimensional read out with 40 mm strips. . # strips: 224 (20 E/ channel) Fine tracker Y-Z readout Iron shielding 50 cm 30 cm 100 cm 240 cm 280 cm
Power and monitoring system: cables • All power and monitoring cables < 30 m • Top Tracker: • HV 1 cable per gap = 6 cables (12 kV; 1 mA) • LVpreamp 1 cable per chamber = 6 cables (5 V; 2 A) • LV_FE 1 cable per chamber (except fine tracker) = 4 cables (5 V; 4 A) • Vth 1 flat cable (16 conductors) • Analog readout (Igap+ temperature + RH) 1 flat cable (16 conductors) • Bottom Tracker • HV 1 cable per gap = 6 cables (4 for the carpet + 2 for the ground detector) • LVpreamp 1 cable per chamber = 2 cables (5 V; 2 A) only ground detector) • LV_FE 1 cable per chamber (except fine tracker = 3 cables (5 V; 4 A) • Vth 2 flat cable (16 conductors) • Analog readout (Igap+ temperature + RH) 1 flat cable (16 conductors)
Power and monitoring system: DCS • CR Tracker • HV 12 channels (12 kV; 1 mA) • LVpreamp 8 channels (5 V; 2 A) • LV_FE 7 channels (7 V; 4 A) • Vth 16 channels DAC • Analog readout 16 Channels ADC • Beam tracker • See George presentation • Spare channels available to the GIF++ users • DCS modules to be installed in a CAEN EASY crate remotely controlled. Radiation tolerant: to be protected from direct exposition • See presentation from A. Polini
Readout scheme: standard detectors • Standard Tracking trigger top quadruplet + floor singlet+ carpet: • Top tracher and ground tracker 50x100 cm^2 + Underground Tracker: • Strip Pre-amp FE (on chamber) discriminated single ended ECL sent over 15 m of flat cable (not more!) receivers NIM module based Trigger logic DAQ PC Trigger Receiver crate info Eurocard format < 15 m flat cables Single end ECL signal readout VME TDCs Optical fiber to VME TDCs (e.g. CAEN control room VX1190A-2eSST) < 5 m
Readout scheme: high resolution trackers • 3 high resolution trackers: 2 on the roof 1 on the ground • 30x30 cm^2 with 1 cm pitch strips: • Strip New-amp analog sent over <7 m of coax cable (not more!) VEM fast digitizer DAQ PC VME fast digitizer < 7 m coax analog signal can be longer Optical fiber to control room but with more expensive cables
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