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Yasmine Amhis EPFL- 23-11 - 09

Yasmine Amhis EPFL- 23-11 - 09. Status of the LHC and LHCb. Yasmine Amhis EPFL 22-11-09. Adrenaline. Most (all …) of the content of this status report is heavily stolen from various sources (Tuesday meeting, Run minutes, Evian conference….). LHC. The LHC accelerating chain .

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Yasmine Amhis EPFL- 23-11 - 09

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  1. YasmineAmhis EPFL- 23-11-09 Status of the LHC and LHCb YasmineAmhis EPFL 22-11-09 Adrenaline

  2. Most (all …) of the content of this status report is heavily stolen from various sources (Tuesday meeting, Run minutes, Evian conference….)

  3. LHC The LHC accelerating chain • Linac: 50 MeVBooster:1 GeV • PS: 26 GeVSPS: 450 GeV • LHC  something? • To follow up : • http://op-webtools.web.cern.ch/op-webtools/Vistar/vistars.php?usr=LHC1

  4. The LHC cryptic monitoring

  5. LHC SPS injects beam in the LHC

  6. LHC

  7. LHC

  8. LHC Repairs (status on the 16.11.09 at 10:00 AM) • 14 quadrupole magnets replaced. • 39 dipole magnet replaced. • 54 electrical interconnections fully repaired. • Over 4 km of vacuum beam tube cleaned • Nearly 900 new helium pressure release ports are being installed around the machine. 6. 6500 new detectors are being added to the magnet protection system.

  9. LHC Plans

  10. LHCb Utility of beam events • Coarse Timing. • Finding z-location of interaction point in all experiments. • Beam stability and background. • First “Switch on” with beam. • Rates from beam halo. • Beam Gas  Global and local fine timing and space alignment.

  11. LHCb Collisions at 450 GeV • Hope to start with 5 ×1010 per bunch. • If rates and life time allows, try van der Meer scan as soon as possible. • First fill(s) without LHCb magnet and then, as soon as useful, with field • Aim to finish year with (parts of) VELO (out but on) and field ! • Trigger strategy • No bias/minimum bias interaction trigger with anti-cosmic. • Start out in TAE if still needed after Single Beam run with RICH in spying mode. • Calibration triggers at 50 Hz. • Luminosity triggers for test purposes at 50 Hz total. • HLT in pass all mode. • VELO alley and triggers needed to test closing procedure and measuring luminous region. • Seems a very slim hope to get collisions above 450 GeV before Christmas • Hope (minimum ambition) is high to achieve ramp of single and perhaps two beams. • Collisions at 1.1 TeV.

  12. LHC & LHCb Run news: 22.11.09. 9:00 AMminutes from Rolf Linder. • From 20h30 to 21h00, the LHC delivered • quite beam 1 (QB1) with: Up and running: • Calorimeters, OT, Muons, • VELO (one module each side) . • From 23h00 to 23h30, QB1 : • Joined : IT (1 box), TT (one layer C side), • VELO (5 modules per side). • About a 100 beam gas events were recorded.

  13. LHCb Offline reconstructed beam gas events 22.11.09 at 08:31 PM the date were distributed To tier-1 sites.

  14. LHCb Splashes at LHCb

  15. Le reste du monde Splashes at ATLAS & CMS LHC

  16. Conclusion, 23.11.09 at 8:08 PM The possibility to have collision in the coming 24 hours is becoming serious.  The management of LHCb is in  contact with the LHC coordination, and we should get more news around 9 PM.  A meeting is then organised in the  control room at 9:30 with all SDs to agree on the strategy. Velo (Stefano+Karol), ST(Abraham), OT(Antonio), RICH(Greig), Calo (Marie-Noelle),  Muon (Sandro) and L0  (Patrick) have been contacted.

  17. Conclusion, 23.11.09 at 10:10 PM • After discussion with all SD and the management, the following strategy has been agreed: - LHC will inject only ONE bunch per beam. Colisions are then either ATLAS+CMS or LHCb or Alice. - We are interested to look at these possib le collisions, and all 'big' detectors are ready to go to nominal  voltage, with some care. This means RICH, OT, Calo and Muon. - We wont turn ON the silicon detectors (Velo, ST) - If/when LHC will announce that they will proviode collisions for us, the shift crew should call ,the Run  Chief, the Commissioning Coordinator, and all the SD coordinators excluding 

  18. BACKUP SLIDES

  19. LHC cooling

  20. Beam dump

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