• Report from meetings
  • MEB -> MG
    • The issue with the geometry of MQTL was investigated. Possible explanation is the presence of araldite ball in the aperture.
    • YP mentioned that a request for absorbing 6 SSS with repaired electrical problems was sent by Michele Modena. It will be checked on a magnet-to-magnet basis, and MEB will give its approval.
  • TCC -> BJ
    • There was a discussion on planning and L. Evans presented the option for commissioning at 450GeV (hardware commissioning in only one octant).
    • New installation schedule was presented by S. Weisz.
  • SLM -> MG
    • The internal deadline for submitting EPAC papers  to Oliver was last Friday. MG will have a look at the papers if the deadline is not met.
  • LHC-MAC -> MG
    • Presentations on LEIR commissioning (C.Carli), collimation (Ralph) and RF.
    • Closed session presentations on recent results of DA studies (MG), flat beam option (SF), but committee mostly interested in technical aspects of LHC (QRL, installation, DFB etc.).
• Update on the status of the optics database -> TR
  • A detailed analysis of the V6.5 and V6.500 error routines was performed and a number of bugs corrected.
  • A bug was found assigning wrong aperture to SpSSS that are rotated at installation. 
  • RdM found also some bugs on polarity.
  • MG will test the routines for the measured errors and proceed with the data production.
  • TR mentioned that he found a potential issue with the option ADD in the error routines when mixing statistical with measured errors. WH will check.
• Discussion of new LHC commissioning scenario -> MG (pdf file)
  • Installation completed by end of 2007 with minimum hardware commissioning.
  • Commissioning with collisions at 450 GeV (calibration run, no physics) followed by 3-4 months of shut down.
  • The option will need no crossing angle and number of bunches limited to 156 (10^30 luminosity).
  • The conditions are: no magnetic cycles, IR1/5 partially squeezed, IR2/8 at injection settings.
  • Optics: minimum β* possible (>4m), new optics powering issues (SF).
  • DA (triplets at injection) and use of correctors (MG).
  • Beam-beam effects: injection tune, transient behaviour when injecting Beam2, separation, spectrometers (WH).
  • Feedback from all LOC members is needed.
  • The option will be discussed during an LTC meeting on July 5th and thus a LOC meeting will take place also next week to discuss the progress.
  • YP asked about the possibility to have a 1 TeV run option. MG replied that this is not clear (degaussing cycle only or collisions as well).
• AOB

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