1 operationsoperations csc is stable running since hi run has started. the low csc occupancy in hi...
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OperationsOperations• CSC is stable running since HI run has
started. • The low CSC occupancy in HI running
allows us to operate all HV channels at nominal values
• Experts have found a bug in the DCC firmware which may be the origin of the CSC loss of efficiency at high readout rate
• CSC plans to implement the CMS-wide plan of action to recover from and mitigate SEUsThe plan for the LHC YETS has been developed.
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Status of the CSC plan for the LHC winter shutdown
Status of the CSC plan for the LHC winter shutdown
M. Ignatenko (UCLA)CSC Operation and DPG meeting
CERNJanuary 11, 2012
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A source of bad vacuum at -18 m away from IP
A source of bad vacuum at -18 m away from IP
A good news: a source of the bad vacuum at -18 m away from interaction point has been found. The decision to replace a bad element has been taken.It will delay the LHC start for 1 week.
Radiation survey of the beam pipe area on minus side of the CMS
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Turbine replacement for X3J31 rack
Turbine replacement for X3J31 rack
The turbine in the X3J31 rack had a broken cable, which jeopardized reading temperature sensors.During the turbine replacement 4 optical cables and 1 TMB were damaged.
The damaged fibers and the TMB have been replaced.
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TMB 3.3 V fuses replacementTMB 3.3 V fuses replacement
• Silver plated 3.3 V fuses have been replaced by gold plated ones on 50 TMBs.
We didn’t replaced the fuses on TMBs which have 3.3 V readings bigger than 3.16 V and where the access is blocked by 2 layers of skew clear cables.
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Things to do before January 17Things to do before January 17
1. LV connectivity test for 9 CSCs. 2. Maratons and heat exchangers vacuum cleaning in UXC. 3. OPFCs and heat exchangers vacuum cleaning in USC. 4. Hardware preparation for the SYSTEC CAN-Bus controller test.
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ME4/2 post installationME4/2 post installation
The post installation for ME42 chambers is going on.
Take into account one week delay in the CMS schedule we can better reschedule all hardware jobs.
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Not urgent jobsNot urgent jobs
• Racks inspection and missing part installation (air reflectors, front panels etc…)
• Temperature sensors commissioning in UXC/USC.
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Shift-leader and central DCS shifter request
Shift-leader and central DCS shifter request
Available shift-leader shifts in January 2012
There is a good opportunity to download (refresh) firmware to the CFEB and DMB EPROMs on
January 21-22
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Available shift-leader shifts in February 2012
Available shift-leader shifts in February 2012
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Available central DCS shiftsAvailable central DCS shifts
January 2012
All February central DCS shifts are taken.