Status Muon Subsystem ME1/ ×0.5 m² ME1/ ×0.8 m² ME1/ ×0.9m² ME 2/ ×1.25 m² ME3/ ×1.25 m² ME4/ ×1.25m² ME23/ ×1.3m² ME4/ ×1.3m² 473 CSCs (cover about 6000 m² ) **6 anode wires anode readout channels cathode readout channels
CSC status at the end of LHC proton run CSC demonstrated high efficiency in But without access to the chambers we cannot improve it
CSC real run efficiency HV Distribution board died D-link board failure caused loss of the configuration for a few chambers D-link board failure caused loss of the configuration for a few chambers
Preparation for stable running in 2012 LV 1. Replacing 3.3 V fuses on the TMB boards. 2. Connectivity test of 7 V lead to the on-chamber electronics. HV 1. Implement new protocol of the DCS- HV server communication. 2. Increase threshold for HV current trips in the inner ME rings. EPROM reloading 1. Automate EPROM downloading procedure. 2. Test of an effect of regular refreshing of the EPROM contents
Losses of on-chamber electronics We have lost only 1 ALCT in It was not unexpected. This ALCT didnt have JTAG communication since 2009 and as soon as EPROMs lost firmware the board has been lost. 2. The accumulated rate of dead CFEBs is 7 boards a year. The reasons are different (CFEBs, LVDB, cables). Right now we have 32 dead CFEBs.
Shifts in 2011 General Requirement for 2011: 6 points per Author PNPI participates in Trigger and DCS Central shifts shifts (94.5 shift-points). CSC DQM shifts shifts (6 weeks)
CSC Upgrade I Original design unfinished – ME4/2 not built 72 ME4/2 chambers to complete system Identical to chambers already built and working well Increase redundancy of system Efficient triggering at high luminosities
CSC Production Plans Assembly in B904 factory at CERN Currently being renovated – occupancy end of 2010 ~1000 m 2 space with good services CERN will provide two clean rooms for CSC Shipped tooling and parts from Fermilab Parts for approximately 3 prototypes + spares Shipment has arrived in B904 Plans for 2011 Plan to set up machines in January – February 2011 Then produce 2-3 prototypes as part of a learning curve (debug systems and train personnel)