1. Summary of FEE-Integration Meeting LNF, 10.09.2003 1 Summary of the Frascati meeting on chamber & front-end integration on 10 September 2003, provided by Adriano Lai Items discussed: - System integration - Front-end circuitry connections - Grounding - LV distribution - Cooling - Production & test of front-end boards

2. Summary of FEE-Integration Meeting LNF, 10.09.2003 2 System integration M2-M5

3. Summary of FEE-Integration Meeting LNF, 10.09.2003 3 380mm "space" for cabling top hook foot  Y(Y) 2cm  2cm (Adalberto)

4. Summary of FEE-Integration Meeting LNF, 10.09.2003 4 We have a solution for racks of stations M2-M5, which provides enough space for crates and cables.We have a solution for racks of stations M2-M5, which provides enough space for crates and cables. Access to the platforms is not yet clear and a convenient solution has to be sorted out in the coming months.Access to the platforms is not yet clear and a convenient solution has to be sorted out in the coming months. The design of the tunnel is under RICH 2 is ongoing.The design of the tunnel is under RICH 2 is ongoing. We should keep pushing M1 racks into this tunnel.We should keep pushing M1 racks into this tunnel. Many pending questions for M1 (chamber and electronics) integration, installation and maintenance !Many pending questions for M1 (chamber and electronics) integration, installation and maintenance ! No resources available for integration work of station M1 at CERN !No resources available for integration work of station M1 at CERN ! A possible solution for the M2-M5 integration has been sorted out, taking into account:A possible solution for the M2-M5 integration has been sorted out, taking into account: –the system requirements –the space constraints –safety aspects (seismic stability of the system and aspects related to work on platforms at height) aspects related to work on platforms at height)  Despite some drawbacks, present solution is very appealing and agreed upon within the muon group. Manpower resources to finish drawings in time are insufficient.Manpower resources to finish drawings in time are insufficient.  Part of the production drawings have to be done outside. (Burkhard conclusions on integration) Dose reduction between a factor 10 to 5

5. Summary of FEE-Integration Meeting LNF, 10.09.2003 5 Front-end circuitry connections with the outside world From SB To next board To IB/ODE From LV (Paolo)

6. Summary of FEE-Integration Meeting LNF, 10.09.2003 6 Grounding recipes 1. Grounding à la CERN

7. Summary of FEE-Integration Meeting LNF, 10.09.2003 7 Grounding recipes 2. Grounding à la LNF Faraday cage is the reference ground Electronics ground and detector ground must be connected to FC through low impedance path Use a star structure of grounding (if possible) Faraday Cage ASDQ++ board SPB Buffer ground connection Buffer board FE ground connection LV power supply Faraday Cage Detector ground connection

8. Summary of FEE-Integration Meeting LNF, 10.09.2003 8 LV – 2. LV distribution Three possible solutions explored: 3050 A to be delivered to front-end (last estimate) 2. Radiation tolerant (switching) LVPS modular system in the cavern (EASY solution) 1. Standard (switching) LVPS modular system outside the cavern (PL500 solution) Main Generator Bridge Rectifier Superflat Mininiature transformer Voltage Regualtor Regulated output Voltage Double sinewave ON CHAMBER electronics 3. “Custom” solution

9. Summary of FEE-Integration Meeting LNF, 10.09.2003 9 Detector Cooling Counting House Area Detector Area Counting house air cooling capacity: 50kW 2MW available 1.4MW used 60kW For LV

10. Summary of FEE-Integration Meeting LNF, 10.09.2003 10 Finite elements simulation of one station Inlet Temperature [ºC]25 Max. Temperature[ºC]38 Outlet Velocity [m/s]1.0 Inlet Temperature [ºC]25 Max. Temperature[ºC]38 Outlet Velocity [m/s]1.0 Inlet Temperature [ºC]25 Max. Temperature[ºC]32 Outlet Velocity [m/s]2.0 But… How is heat dissipation inside the chamber?

11. Summary of FEE-Integration Meeting LNF, 10.09.2003 11 Production & test of front-end boards Sharing of responsibilities for front-end board test and production SPB production and test  Potenza FEB design and production  Cagliari FEB test  Potenza & Roma1 + Rio ? DIALOG test  Cagliari CARIOCAtest  CERN + Rio ? Coordinator for FEB production and test  Walter Bonivento (Cagliari)

12. Summary of FEE-Integration Meeting LNF, 10.09.2003 12 Chain tests Chain tests have been performed in the following configuration: - DIALOG - SB - IB + TB - ODE (with the exception of optical transmission) This first chain will be soon completed (October) Next step System chain with: - 5-10 DIALOG - 1 CANbus branch and 3 SB - 3 TB-IB - 3 ODE boards - 1 “trigger”receiver and 1 GOL receiver This is planned for the end 2003 Subsequent step: test beam, full chain with chamber and trigger system Spring 2004

13. Summary of FEE-Integration Meeting LNF, 10.09.2003 13 2003 Milestones 1 – Prototypes for chain test SB (Roma1)Ok 100% PDM (Roma1)50% IB + TB(LNF)100% ODE(LNF + SYNC – CA)90% + SYNC 2 - Modules 0 SBok IB + TBok PDMdelayed  November 03 ODEStill needed: optical Tx, final SYNC, QPLL (CERN) 3 - Integrated circuits SYNC + CARIOCAOctober 03 DIALOG Jan 04 (Eng run delayed April 04)