• Follow up of actions
  • Squeeze study for LHCCWG -> YP (pdf file), MG
  (pdf file)
  • IR8: YP shows that at the end of the ramp with injection settings there is no problem. Only the vertical separation is larger at the end of the ramp with respect to the nominal collision case, but correctors have enough strength.
  • MG presents the work in progress with SF for the linear matched optics from 11m to 9m for IR1 and 5. The key optics quantities, such as tunes, chromaticities and beta values at IP are plotted for both the matched optics (beta*=11 m and 9 m) and intermediate optics obtained by linear scaling of the gradients.
• Report from meetings
  • ATLAS high-beta TDR -> HB
  • Per Grafstrom informed HB that the ATLAS Collaboration wants to write a TDR for the high-beta optics, and would like to have a contribution on machine parameters. WH will help writing this high-beta optics chapters (high beta experience on SPS).
  • Early TOTEM optics (90 m) are within the tuning range, by retuning IR4. A presentation will be given during the next meeting.
  • MG suggests to have a final optics for V6.500. One should be careful with TDR write-up, in order not to give wrong impression about the viability of certain options, as for the high-beta option the integer part of the tune is different from the nominal value. For the time being there is not coherent scheme to inject with a tune compatible with the one imposed by the high-beta option.
  • MEB -> MG
  • Installation puts more and more pressure on the evaluation of magnets.
  • TCC -> MG
  • JBJ attended the meeting. Pressure test are going on for the QRL in arc 1-2. Interconnect for 7-8 finished and pressure test will start soon.
  • An ECR from BT group was presented for including vacuum valves in every kicker.
  • A presentation by RA reported about the collimators installation schedule.
  • LHCCWG -> MG
  • Meeting devoted to timing issues
  • HB raised the question of having a statement concerning luminosity measurements in the early stage of LHC commissioning. It turned out that the nominal monitoring system will not be performing well enough. However, it was decided that no special effort can be dedicated to improve the current baseline. The same approach is followed for the the low energy run.
• AOB
• JJ informed that the optics for collisions at 450 GeV are published on the web.

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