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Strips operations , 2012 outlook

Strips operations , 2012 outlook. Lino Demaria – INFN Torino. Strip Tracker Status. Dead channels evolution: <SST> =1.5  2.2%. Strip Tracker @ 97.8% Begin 2011. Lost 1 CR. 1 CR short HV shorts. % of dead channels. HV open. <SST> = 1.5  2.2%. CR shorts.

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Strips operations , 2012 outlook

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  1. Stripsoperations, 2012 outlook Lino Demaria – INFN Torino

  2. Strip Tracker Status L.D. : Tracker status - TPO 22/03/2012

  3. Dead channels evolution:<SST> =1.5  2.2% Strip Tracker @ 97.8% Begin 2011 Lost 1 CR 1 CR short HV shorts % of dead channels HV open <SST> = 1.5 2.2% CR shorts

  4. Channels excluded from DAQ: time evolution <SST> =1.5  2.2% 2 TIB Cooling Loop closed 1 TID Cooling Loop recommissioned 1 TID Cooling Loop closed Closed CL recommisioned % of dead channels Lost 1 CR 1 CR short HV shorts HV open+ 1 CL closed <SST> = 1.5 2.2% CR shorts We were able to promptly recover modules associated with closed cooling loops They were recovered before physics data taking, both during 2010 and 2011

  5. Alive channels: 97.75% • TIB 94.3% • TID 98.1% • TOB 98.2% • TEC 98.9% • Details: • 2 CR in short (~0.7%) • 1 CR missing (0.35%) • HV lines missing(0.1%) • HV lines shorts (0.7%) • fibers/CCU /others (0.4%) • Recoverable at LS1: • 2-3 CR corresponding to 0.7-1% Short in CR: 0.35% Recoverable at LS1 work@Patch panel Short in CR: 0.35% Recoverable at LS1 Work@Patch panel HV shorts Lost CR: 0.35% NEW : TOB 3.1.2 à one TOB control ring (layer 3) thatnowneeds redundancy to skip one CCU (6 modules) à happened last yeardirectlyat HI startup

  6. Radiation damage L.D. : Tracker status - TPO 22/03/2012

  7. Leakage current radial dependence Strip Tracker Pixel L.D. : Tracker status - TPO 22/03/2012

  8. Dependence with Fluence and annealing L.D. : Tracker status - TPO 22/03/2012

  9. Model Predictions L.D. : Tracker status - TPO 22/03/2012

  10. L.D. : Tracker status - TPO 22/03/2012

  11. L.D. : Tracker status - TPO 22/03/2012

  12. Depletion Voltage L.D. : Tracker status - TPO 22/03/2012

  13. NOT to be forgotten ! Hybrid temperatures Closed CL: 3 TIB L3 CL 1 TOB L4 CL 1 TID R1-R2 CL

  14. Silicon Detector temperatures Closed CL: 3 TIB L3 CL 1 TOB L4 CL 1 TID R1-R2 CL

  15. Strip Tracker cooling • Now running at 4C, stable. Low leak in SS2 • Crucial for Tracker future the running at low temperature after LS1 (more on Ettore’s talk) • Cold test done this year is missing a flow measurement on main circuit (to be done next TS) • Upgrade needed for Primary Cooling (Evaporator; maybe also Compressor) and for our two cooling plants (SS1 and SS2) • Understanding the scenario of running at -25C (not obvious for cooling system and for humidity in services) • Crucial decision this year (spring) for the lifetime of the detector - Good work of the Cooling Working Group L.D. : Tracker status - TPO 22/03/2012

  16. L.D. : Tracker status - TPO 22/03/2012

  17. Readiness for 2012 L.D. : Tracker status - TPO 22/03/2012

  18. LHC challenges this year L.D. : Tracker status - TPO 22/03/2012

  19. L.D. : Tracker status - TPO 22/03/2012

  20. Perspective for 2012 pp running:High PU and 25 ns Operations • High Pile-Up • High Pile test run very successful • We can take data with 5 1030 cm-2s-1/bunch at 110 kHz of zero bias L1 triggers (PU=30) • We expect to be fine for 7 1033 cm-2s-1, 50 ns bunch spacing environment • 25 ns • The SiStrip Tracker was designed for 25 ns operations • Test runs were successful • Small increase of OOT PU Lino Demaria - Strip TK operations summary, YETS plans, 2012 outlook

  21. Tracker status (1) • Recent Achievements • Data for alignment: • 0.75M good tracks with B=0 • 0.86M good tracks with B=3.8T • other 1.24M needed before June (=3.5 days of cosmics data taking) • DCU calibration taken • IV scan done • DAQ team fixed the problem of Tracker configuration (see Derek presentation on Monday) L.D. : Trackerstatus - TPO 22/03/2012

  22. Tracker status (3) • Problems under work • FED configuration problem (few FPGA not well configured) – affect at low level • APV-APVE timing mismatch • No change on Tracker hardware • GT-TTCmi cables changed (1-2ns) • Past problems were solved with APVE firmware changes • S/N decreased of up to 5% in cosmics taken on peak • Early 2012 cosmics in deconvolution were fine (timing seems fine) • Evidence of radial dependence shown • Offline producing more plots • Others • TEC-4.8 looses clock/trigger time to time • Discussion with ring expert needed – Erik organizing that • TEC+ interlock L.D. : Tracker status - TPO 22/03/2012

  23. Tracker Status (2) • Test still to be done – outside beams • Noise vs bias scan • Power Scan • Planned test during first collisions • 3.5M events with one colliding bunch (first fill 1-2h) • Full HV-scan (2h) • Delay run (0.5h, data ok for physics) L.D. : Tracker status - TPO 22/03/2012

  24. Cosmics 2012 L.D. : Tracker status - TPO 22/03/2012

  25. Cosmics in Deconvolution mode L.D. : Tracker status - TPO 22/03/2012

  26. L.D. : Tracker status - TPO 22/03/2012

  27. L.D. : Tracker status - TPO 22/03/2012

  28. Charge in Run2011B TPO meeting

  29. Beams 2012 L.D. : Tracker status - TPO 22/03/2012

  30. CMS scheduling for first collisionshttps://twiki.cern.ch/twiki/bin/viewauth/CMS/CollisionsMar2012 • first 3x3 bunches • Tracker peak mode • First 48x48 fill • Timing run • Second 48x48 fill • Tracker bias scan • 84x84 fill • Pixel bias scan • ES at high gain • Tracker delay run L.D. : Tracker status - TPO 22/03/2012

  31. Conclusions and toughts • Tracker ready for collisions this year • No problem seen for high pile-up not radiation damage • DAQ is always under-pressure • DCS is loosing people – going to central support • We need to be careful on evolution of dead parts • Dead part at 2.25% (~1.3% in TIB) • Parts without cooling to be better understood (thermal instabilities / temperature) • Cooling performance + radiation damage = lifetime of Strip Tracker • Tracker should survive up to LS3 • On radiation damage: only few people working on it • In INFN there are several experts that could contribute (many participant to RD50) L.D. : Tracker status - TPO 22/03/2012

  32. Backup L.D. : Tracker status - TPO 22/03/2012

  33. L.D. : Tracker status - TPO 22/03/2012

  34. L.D. : Tracker status - TPO 22/03/2012

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