Gif++ CR tracker setup G. Aielli for the RPC collaboration Overall - - PowerPoint PPT Presentation

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) 40 cm 100 cm 50 cm

• Y-Z readout
• Y only readout
• Y-Z readout
• Y only readout

Fine trackers

30 cm 30 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)

50 cm

100 cm

30 cm

Fine tracker Y-Z readout 280 cm 240 cm Iron shielding

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

Receiver crate Eurocard format < 15 m flat cables Single end ECL signal NIM module based Trigger logic VME TDCs

readout

Optical fiber to control room Trigger info VME TDCs (e.g. CAEN VX1190A-2eSST) DAQ PC < 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

VME fast digitizer < 7 m coax analog signal can be longer but with more expensive cables Optical fiber to control room DAQ PC