Presents: RA, CB, HB, RDM, SF, MG, JBJ, JJ, AK, AL, TR, SR, AV

• Follow-up of actions from previous meetings
  • Field errors for triplet magnets -> FS
    • In the absence of FS (sick), MG reports that data collection is still in progress. In particular, the geometrical data is still missing. A complete and certified set of data including FQ and geometry is expected by the end of the week.
• Report from meetings
  • TCC -> JBJ (pdf file)
    • Problems with the QRL modules in sector 8-1 are reported.
    • Installation of sector 7-8 is late by about 4 weeks.
    • Installation of sector 8-1 is late by 6 weeks. This will have impact on installation of sector 3-4, but not on 4-5 (installation should start by end of July).
    • The installation order will not be changed to reduce delays.
    • R. Ostojic reported about LSSL8 installation (pdf file)
      • Q1-Q3 are already late
      • Q5, Q6 should be installed by October and approved by MEB by beginning of August.
• New Doctoral student in Collimation Team -> RA
  • Chiara Bracco (CB) joined the Collimation team on June 1st. She will work on loss studies, halo dynamics.
  • A fellow should join the team by September 1st.
• Risk registry for the AB-ABP-LOC activities -> OB (pdf file)
  • In the absence of OB (course) MG presents the proposal prepared by OB.
  • Criteria for defining the risk are provided: the inventory was defined by OB.
  • The enquiry is CERN-wide and should be aimed at defining strategies to cope with high-risk activities (more resources).
  • Following the discussion modifications were made to the original proposal: the revised version will be sent to OB and JPR to be discussed at the SLM and then transmitted to the AB-DL.
• Highlights from PAC05  -> HB, SR (pdf file)
  • Difficult to attend the many events in parallel (1300 participants, 3 oral sessions in parallel, posters sessions in parallel with oral ones).
  • Strong emphasis on ILC activities.
  • Good general talks (Monday and Friday).
  • Relevant studies for LHC activities:
    • Post-irradiation properties of candidate materials for high power targets.
    • Collimation studies at the Japan Proton Accelerator Complex.
    • Ion energy deposition studies at GSI.
    • Nonlinear optics corrections at RHIC.
• Effect of b5 spool pieces failure on DA -> FS
  • In the absence of FS (sick) this topic is reported to a forthcoming meeting.
• Status of LHC V6.5 MAD model  -> TR
  • Error routines for the official version V6.5 have been developed and cross-checked.
  • Error routines for assigning measured errors are available for cold D1 separation dipoles and D2. In this case the measured FQ is assigned to the allocated slot. A test case to assign measured errors to main dipoles is also available. These routines should serve as small-scale test for the future mechanism of assignment of magnetic errors extracted form the official database.
  • The available error routines are for beam 1
  • The issue of generating a beam 2 model is being considered. A time-scale for its development will be prepared and presented in a next meeting.
• Tracking with MADX -> AK (pdf file)
  • A detailed analysis of the physics in the MADX tracking module was performed and presented at the last MADX meeting.
  • Inconsistencies were found (mixing of different variables and mixing of different approximations).
  • A similar situation is found also for the Twiss module.
  • Thus analysis will allow defining the better strategy to correct the situation within the tight boundary conditions of available resources.
  • Such a strategy will be presented in a forthcoming meeting.
• AOB
  • Requests from Experiments for special optical solutions -> MG
    • A meeting between D. Macina TR and MG was held: the Experiments would like to have an optical solution with beta*=2 m in IR1/5/8 and nominal in IR2.
    • The optics are ready, but the crossing scheme is missing
    • WH provided the guidelines to choose the crossing angle vs. beta*: the beam separation constant, i.e. scale as 1/Sqrt(beta*) so to have a beam separation in the triplet of 11 sigma.
    • Once ready, the optical configuration will be stored in the web database.
  • Cancellation of Journals -> MG
    • The proposal made by SCIB and circulated by OB should be commented: feedback should be sent to MG by Friday.
  • New tolerances for SSS in the dispersion suppressor -> JBJ (pdf file)
    • Special tolerances for SSS in DS are ready: they will be presented at MEB next Friday.
    • This work represents a first step in the analysis to be done for special SSS.