НАУЧНАЯ СЕССИЯ ОТДЕЛЕНИЯ ФИЗИКИ ВЫСОКИХ ЭНЕРГИЙ 27 декабря 2011 Проект CMS в 2011 В.Сулимов 27.12.20111. - презентация

1 НАУЧНАЯ СЕССИЯ ОТДЕЛЕНИЯ ФИЗИКИ ВЫСОКИХ ЭНЕРГИЙ 27 декабря 2011 Проект CMS в 2011 В.Сулимов

2 The CMS Collaboration 3381 scientists and engineers (including ~840 students) from 173 institutes in 40 countries ~ 1/4 of the people who made CMS possible

3 The Standard Model at 7TeV

4 LHC Performance in

5 5 Event shown above has 13 reconstructed vertices

6 Muon Subsystem

7 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

8 CSC status at the end of LHC proton run CSC demonstrated high efficiency in But without access to the chambers we cannot improve it

9 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

10 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

11 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.

12 CSC raises the threshold for HV trip current

13 После 2 лет стабильной работы CSC сталкивается с другой проблемой: без доступа к детектора мы должны обеспечить стабильную работу CSC в течении еще одного года в условиях повышенной светимости LHC

14 I ISR

15 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)

16 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

17 ME4/2 Upgrade R&D Production of 31 CSC

18 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)

19 CSC tooling in B

20 ME4/2 Upgrade

21 ME4/2 Upgrade

22 ME4/2 Upgrade

23 ME4/2 Upgrade

24 ME4/2 Upgrade