Yasmine Amhis EPFL Yasmine Amhis EPFL Status of the LHC and LHCb Adrenaline

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

The LHC accelerating chain LHC Linac: 50 MeV  Booster:1 GeV  PS: 26 GeV  SPS: 450 GeV  LHC  something? To follow up : webtools/Vistar/vistars.php?usr=LHC1

The LHC cryptic monitoring

SPS injects beam in the LHC LHC

Repairs (status on the at 10:00 AM) 1.14 quadrupole magnets replaced dipole magnet replaced electrical interconnections fully repaired. 4.Over 4 km of vacuum beam tube cleaned 5.Nearly 900 new helium pressure release ports are being installed around the machine new detectors are being added to the magnet protection system. LHC

Month OP scenari o Max numbe r bunch Proton s per bunch Min beta* Peak Lumi Integra ted % nomin al 1 Beam commissioning 2 Pilot physics combined with commissioning 433 x x ~200 nb x x ~1 pb x x ~9 pb a No crossing angle 1567 x x ~18 pb b No crossing angle – pushing bunch intensity 1561 x x ~36 pb Shift to higher energy: approx 4 weeks Would aim for physics without crossing angle in the first instance with a gentle ramp back up in intensity 7 4 – 5 TeV (5 TeV luminosity numbers quoted) 1567 x x ~26 pb ns – nominal Xing angle 1447 x x ~23 pb ns 2887 x x ~46 pb ns 4327 x x ~69 pb ns 4329 x x ~110 pb LHC Plans

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. LHC b

Collisions at 450 GeV Hope to start with 5 ×10 10 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. LHC b

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

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

Splashes at LHCb LHC b

Le reste du monde LHC Splashes at ATLAS & CMS

Conclusion, 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.

After discussion with all SD and the management, the following strategy has been a greed: - 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 rea dy 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 Conclusion, at 10:10 PM

BACKUP SLIDES

LHC cooling

Beam dump