Presents: CB, HB, SF, MG, AK, RdM, TR, TW

• Follow-up of actions from previous meetings
  • Field quality issues of MQTL quadrupoles -> MG (pdf file)
    • With respect to the previous results, the effect of the feed down from a closed orbit of 4 mm were taken into account in the numerical simulations (SF provided the special version of the error routines).
    • The impact of the feed down on DA is marginal.
    • A presentation to the FQWG will close the case.
• Report from meetings
  • MEB -> SF
    • Installation of sector 3-4 is about to start.
    • Approval of SSS and special SSS continues.
    • Next magnets to be considered will be the injection septa for IR8.
  • TCC -> JBJ
    • JBJ communicated to MG that there were no topics of particular interest for LOC at the the last TCC meeting.
  • TAN Workshop -> HB (pdf file)
    • The meeting aimed at managing the space requests for the TAN.
    • A positive outcome: robust luminosity measurement is now perceived as a must.
  • SLM -> MG
    • Organisation of "Habilitation électrique" courses.
    • Management of the car pool: out of the four presently available, two will be moved to Prevessin for the RF Group. Two will be kept here for ABP. The actual needs will be monitored during the whole 2006.
• Tracking results with V6.5 optics -> RdM (pdf file)
  • Tracking simulations with the LHC optics V6.5 were performed and compared with the results obtained with the version V6.4 and the nonlinear correctors in the low-beta triplets moved. The simulations are performed at injection.
  • There are still some significant differences in the results calling for a detailed comparison of the two models. In particular:
    • Excitation of the corrector circuits: are the same in both models?
    • Modelisation of the separation dipoles including the lead/return end effects.
  • The comparisons will be made in the next weeks and reported back at LOC (Action: RdM, MG).
• Organization of sector test -> MG
  • Following the presentation made by M. Lamont (pdf file) at the LHC Commissioning Working Group, the involvement of LOC members in the forthcoming sector test has to be reviewed.
  • A discussion of possible tasks for LOC members is launched and some feedback is already given. In particular it would be good to increase the contribution of LOC to the optics measurements during the sector test.
  • The outcome of the discussions will be summarised and communicated to M. Lamont (Action: MG).
• AOB
  • Change of day for LOC meeting?
    • It is proposed to move the LOC meeting to Monday morning to avoid clashes with FQWG and WGA. The proposal is accepted. MG will take care of the details of the new organisation.

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