1 Chamber Interfaces Adalberto Readout-, I2C-, HV-, LV-, Gas- and chamber support interface. Space issues.

2 380mm  Y(Y) 2cm  2cm

3 Balconies on support structure allow to mount the chambers and obtain the required alignment precision (±1mm) Different foot dimensions allow tuning of the different heights Light hooks on the top ensure chamber stability Chamber fixation & positioning space for cabling Antonio  Alessandro

4 M3 M1 M2 M4 M5 R1 R2 R3 R4 5(8) 4(8) 5(8) 2(8) 4(8) 6(8) 7(8) 5(8) 4(8) 6(8) 5(8) 2(8) 4(4) 6(4) 3(4) 4(4) 6(8) 3(8) 6(8) 3(8) 3(4) 3(2) 3(4) 3(2) 4(4) 6(8) # front-end boards 4(4) 8(4) 4(4) # output/DIALOG

5  Y = 0 cm  Y = 1 cm  Y = 2 cm highestcabledensity

6 34 mm free space space for HV connector  6,5 cm calibrated height glued on panel outside F. cage foot side without HV is similar ABS plastic for electrical insulation from the wall

Alessandro

8 quadrant symmetry for INFN & PNPI chambers gas HV

9 quadrant symmetry for CERN chambers gas HV

10 R3 ≥34 mm are free on INFN chambers: HV + fee fee 34 mm HV+fee 34 mm fee M45R1

11 a similar space is available on CERN chambers (only bottom feet must support the chamber weight) M23R1 M23R2 foot screwed to FC ?

12 more space is available on PNPI chambers M234R4 during LHCb week it was decided to draw together (INFN-PNPI) the FC …

work in progress but no particular issues are foreseen Alessandro foot & HV interface

Hv bar HV interface 4 +1 spare HV bars connect RC networks to foot connector

CARDIAC signals interface

HV side Hv bar No HV side OPB SPB CARDIAC LVDS signals I 2 C controls pulser LV CARDIAC chamber envelope 83mm 77mm Paolo

Integration 3/12/03 LNF 17 Front-end circuitry connections with the outside world From SB To next board To IB/ODE From LV Paolo

Integration 3/12/03 LNF 18 Grounding on the chamber Faraday cage SPB ground connections CARDIAC OPB LV power supply regulator  Faraday cage is the reference ground  Electronics ground and detector ground must be connected to FC through low impedance path (copper bar) connector for chamber grounding (to the copper bar) Giulietto

Integration 3/12/03 LNF 19 Platform Copper grid Racks Copper bar  Detector insulated from the support structures  Apparatus and platform MUST have the same Reference Ground Grounding Giulietto

20 serial gas distribution flexibles for short (chamber to chamber) connection inox for main piping

21 parallel gas distribution flexibles for short (chamber to pipe) connection inox for main piping

22 LVDS LV I 2 C HV gas global view HV patch panels

23 Cabling vs Faraday cage & envelope definition of chambers Along z (chamber thickness) CERN chamber have 73.2mm < 75 mm (  74 mm) INFN have 70 mm (  more clearance/cabling space) PNPI < 75 mm (  definition in progress) Along x (chamber length) not important Along y (chamber height) remaining space is enough for cables and balconies: the most critical region is in M2R3 were 74 cables (6÷10 mm Ø) must stay on 84 cm 2 (without considering the mm between walls and chamber)