1. Gif++ CR tracker setup G. Aielli for the RPC collaboration

2. Overall Layout of the CR tracker

3. 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 View from bottom

4. 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 30 cm Iron shielding

5. 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)

6. 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

7. 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 Single plane Fast or VME TDCs readout Optical fiber to control room Trigger info Single plane Fast or VME TDCs (e.g. CAEN VX1190A-2eSST) DAQ PC < 5 m

8. 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