Engineering MWPC design configuration schemas Wire Pad Chamber

Engineering: MWPC design configuration schemas

Wire Pad Chamber (WPC) , one gap Avalanche Cdet in parallel to current source (not shown) will reduce current flow to amplifier as ratio of impedances (full Spice-model see below)

2 -gap/layer Wire Pad Chamber (WPC) OR-ing (double signal) Independent HV sources (for reliability)

Cathode Pad Chamber (CPC), one gap Single Cathode Read-Out (SCRO)

Cathode Pad Chamber (CPC), one gap Double Cathode Read-Out (DCRO) Double signal

Combined Wire strip and Cathode Pad Chamber (WCPC) Bad design Rather large loop

WCPC (Single Cathode RO scheme)

WCPC (Double Cathode RO scheme) Double signal

MWPC readout schemes for M 1 R 1 CPC (SCRO) CPC (DCRO)

Anode readout INFN chambers M 1+M 5 R 4 0 mm 39. 8 mm 53. 8 mm 25. 8 mm 11. 8 mm 0 mm -20. 7 mm -6. 7 mm +21. 3 mm +7. 3 mm SPB

Anode readout PNPI chambers M 2+M 3, +M 4 R 4 0 mm 54. 8 mm 10. 2 mm -22. 3 mm 0 mm +22. 3 mm SPB

Anode readout CERN chambers M 2+M 3 R 1+R 2 0 mm 38. 8 mm 54. 2 mm 26. 2 mm 10. 8 mm 0 mm -21. 7 mm -6. 3 mm +21. 7 mm +6. 3 mm SPB The additional ground connector we have at present is not drawn.

Double Cathode readout (CERN chambers) - Single Cathode readout INFN and CERN chambers have just less connectors on equivalent positions - INFN uses no male and female parts, as CERN does ± 23. 2 mm ± 18. 8 mm ± 9. 2 mm ± 4. 8 mm 0 mm OPB