1. Flavio Dal Corso - INFN Padova1 OPERA coll. meeting - Hamburg 3 July 2004 RPC & XPC Electronics Status Front End Boards (FEBs) Controllers HV system Crates & Racks

2. Flavio Dal Corso - INFN Padova2 OPERA coll. meeting - Hamburg 3 July 2004 FEB prototype

3. Flavio Dal Corso - INFN Padova3 OPERA coll. meeting - Hamburg 3 July 2004 FEB block schematic

4. Flavio Dal Corso - INFN Padova4 OPERA coll. meeting - Hamburg 3 July 2004 Front End Discriminator LVDS receiver Very cheap High density High speed Moderate CMRR (~2 V)

5. Flavio Dal Corso - INFN Padova5 OPERA coll. meeting - Hamburg 3 July 2004 Discriminator Performances  =0.003  =4.1 mV

6. Flavio Dal Corso - INFN Padova6 OPERA coll. meeting - Hamburg 3 July 2004 RPC Strip’s Signals (First measurements done underground) Ground connection not the best possible (not yet the final layout). Ground noise well within CM range. Difference signal immune from ground noise

7. Flavio Dal Corso - INFN Padova7 OPERA coll. meeting - Hamburg 3 July 2004 FEB status Prototype (almost) finished. 10 prototypes will be mounted in the next few weeks, to be tested at the INFN-Napoli test stand with the Controller. Tender for the mass production (~500 boards) awaiting for test results.

8. Flavio Dal Corso - INFN Padova8 OPERA coll. meeting - Hamburg 3 July 2004 Controller status Prototype finished, without “Mezzanine”. Tested at INFN Napoli with a FEB emulator.

9. Flavio Dal Corso - INFN Padova9 OPERA coll. meeting - Hamburg 3 July 2004 HV system 3 SYS-127 (available). 33 (4 ch.) positive modules (available). 11 (4 ch.) negative modules (available). 8 (~40 ch. each) I-meter (home made by INFN-Frascati), almost ready.

10. Flavio Dal Corso - INFN Padova10 OPERA coll. meeting - Hamburg 3 July 2004 RPC & XPC cable layout 3 + 6 boards x plane 6 + 6 boards x plane

11. Flavio Dal Corso - INFN Padova11 OPERA coll. meeting - Hamburg 3 July 2004 Racks layout 16 Racks (old MACRO racks), with modification (water cooling and power management). Works in progress.

12. Flavio Dal Corso - INFN Padova12 OPERA coll. meeting - Hamburg 3 July 2004 Crates layout (for one spectrometer)

13. Flavio Dal Corso - INFN Padova13 OPERA coll. meeting - Hamburg 3 July 2004 Custom Crates (FEBs and Controllers) Standard VME crates, with custom backplane. 4 crates for XPC 24 crates for RPC 4 crates for Controllers

14. Flavio Dal Corso - INFN Padova14 OPERA coll. meeting - Hamburg 3 July 2004 Custom Crates

15. Flavio Dal Corso - INFN Padova15 OPERA coll. meeting - Hamburg 3 July 2004 Custom Crates

16. Flavio Dal Corso - INFN Padova16 OPERA coll. meeting - Hamburg 3 July 2004 All the crates and backplanes are already available; mounting in progress.