LHC 2011 - latest news

Week 8: Machine coordinators: Mike Lamont - Gianluigi Arduini (until Friday 25/2)

Nine o'clock meetings on the weekend at nine o'clock.

LHC coordination vistar

Commissioning outline

Day

Summary

Link to report from morning meeting

Monday 28st February
  • Injection and dump protection
  • RF calibration
8:30 meeting
Sunday 27th February
  • TL/LHC matching
  • 13: 00 Collimation
  • midnight: lost cryo maintain - access required; thereafter problem injecting b2 - access required point 8
9:00 meeting
Saturday 26th February
  • 09:00 - 11:00 RF
  • Ramp and orbit in squeeze
  • 18:00 Collimator set-up
  • Aperture measurements overnight Sat - Sun
9:00 meeting
Friday 25th February
  • Access in the morning in shadow of SPS interventions
  • Ramp and squeeze (squeeze to 1.5 m in one go)
  • Collimator set-up
  • Aperture measurements overnight
8:30 meeting
Thursday 24th February
  • 02:00 - 06:00 Damper set-up (B1 only due to LBDS problem B2)
  • 06:00 - 07:30 Access for LBDS
  • 07:30 - 09:00 Recovery from access
  • 09:00-10:00 RF problem
  • 10:00 - 11:30 BPM tests
  • 11:30 - 19:30 - Crossing angles and experimental magnets ON. setting-up interrupted by SPS problem for about 2 hours (fire alarm and interlock problem)
  • 19:30 - 21:00 - Ramp with dynamic reference for the OFB

08:30 meeting

Wednesday 23th February
  • 00:00 – 05:00 Dump checks at intermediate energies (1.4 and 2.4 TeV)
  • 05:00 – 08:00 Measurement of chromaticity decay at injection after pre-cycle
  • 08: 00 Stop beam for intervention on cryogenics in point 2 and preparation for access
  • 09:00-12:00 Access
  • 13:00 Cryo OK
  • 13:00 - 18:00 Recovery and pre-cycle
  • 18:00-18:45 No beam from SPS
  • 18:45 Injection
  • 21:00 – 23:00 Injection of nominal bunch
  • 23:00 - 02:00 Orbit at 450 GeV with nominal bunch
08:30 meeting
Tuesday 22h February
  • 00:40 - 02:00 Squeeze to 1.5 m
  • 02:00 - 07:00 BIC and timing problems
  • 07:00 Injection
  • 07:20 - 08:30: collapsing separation bumps in IR1 and 5 for detector timing
  • 08:30 - 12:30 MPS checks and access/LBDS connection check (DSO)
  • 12:30 - 19:00 Ramp setting-up
  • 19:00- 24:00 Squeeze and beta beating measurement. Lost beam 2 during the squeeze from 2 to 1.5 m.
08:30 meeting

Monday 21th February

  • Access until 11:00 for intervention on current lead, power converter and LBDS B2 intervention
  • 10:00 - 15:00 Heat run Sector 12-23
  • 12:00-13:30 MPS checks
  • 13:30 - 19:30 D1.R5 problem
  • In the shadow: heat run of Sector 12/23, repair of quench heater power supply A13.R1, loaded new compensation coefficents for QPS of main bends, tests on circuits
  • 19:30-21:30 Communication problem with injection BIC
  • 21:30 injection
  • 23:20 3.5 TeV with beam (first in 2011)
08:30 meeting