RPC project status

Muon IB28 February 2012

Pigi Paolucci INFN Napoli & CERNRPC project status2012 Detector start-upRPC system is ON since a week, how it is working ?

28/02/12Muon IB - Pigi Paolucci2Hardware status28/02/12Muon IB - Pigi Paolucci3At the moment we have 11 Chambers OFF, same number of 2011One new single gap chamber in the barrel.

3.5% of dead and masked channels28/02/12Muon IB - Pigi Paolucci4

Current stability during MWGR 28/02/12Muon IB - Pigi Paolucci5

Noise results from MWGR28/02/12Muon IB - Pigi Paolucci6Run 185984 (last night, long run): ~1.0% masked channels, ~1.3% dead channels18 chambers off (5 in the barrel, 13 in the endcap)Average noise ~3 Hz/cm2 (barrel), ~0.3 Hz/cm2 (endcap)

Few noisy strips in Barrel region28/02/12Muon IB - Pigi Paolucci7

Noisy strips from DQM ? YES is possible28/02/12Muon IB - Pigi Paolucci8

ENDCAPBARRELfrom 2 to 25 noiseRun 185 984All hits Plots28/02/12Muon IB - Pigi Paolucci9

Noisy strips/chamberBottom triggerfrom DQM toolBARRELRun 185 984Similar in the 5 wheelsTrigger correlation28/02/12Muon IB - Pigi Paolucci10

2012 Open Issues and organization28/02/12Muon IB - Pigi Paolucci11Deputy DPGKarol confirmed, Silvia Costantini (Ghent) new PVT groupMarcello Abbrescia is the new coordinator

Task forceEfficiency method validationHV scanBakelite productionGas leak studiesUpgrade Summary Report28/02/12Muon IB - Pigi Paolucci12First batch of Bakelite sheets, produced and tested in Pavia, washed at General Tecnica, is now in KoreaMost of the sheets show a dirty surface and cannot be used to produce gaps Second batch will be followed step by step by our experts (March)3 Test sites are almost readyNew link and control boards have been successfully tested at 904 and installed in the Barrel We will keep them runningDatabase work is proceeding very well, thanks to Anton, Daniela and new Pakistan experts.

2011 Summary table28/02/12Muon IB - Pigi Paolucci13Single gapDead chamberNo TH controlBarrel7513 chambersEndcap2430Data Loss for RPC19 pb1 0.37%Overall Operating Channels98.4%Average Efficiency95%Average Cluster Size< 2Average Noise rate (3 1033 cm-2 s-1)1.3 Hz/cm2Max Noise rate (3 1033 cm-2 s-1) RE-2/2/C< 7 Hz/cm2Average intrinsic noise (no-beam) ~ 0.1 Hz/cm2Average current (no-beam) ~ 1 mAAverage current (with beam) ~ 1.5 mATemperature< 21.5 oC

2012 goals and milestones (no news)28/02/12Muon IB - Pigi Paolucci14New efficiency method; test and then in DQM2012 HV scan and comparison with 2011Background studies at high luminosity (1-5 1033)Background summary results in WBMAutomatic PVT Long 2013-2104 shut-down plan definition (July 2012)

Gaps and chambers production904 cosmic stand and laboratory start-upLink and Control board preproduction and test (Feb)Dates to remember28/02/12Muon IB - Pigi Paolucci15Muon Week 18-21 March CERN

Bakelite production validation March HV scan April

Long Shut-down workshop June