Summary notes of the LCU meeting on 06/10/2009

Present:  MA, HB, RC, OD, MG, JJ, JN, AR, FS, MS, GV, SW, FZ

Report from meetings

• SLM and general information -> MG (slides)
  Today we had a shorter agenda and less participants than usual, mainly due to overlap with the CAS.
  In addition to feedback already received on IPAC, MG asked us to more generally provide feedback to him before the end of this month on trip requests for 2010 to help with the travel budget planning (deadline end of the month).
  MG informed that for official trips to international conferences (of duration N days) the total length of the official leave should be N+1 or N+2 depending on the trip distance.
  MG introduced Marek Strzelczyk who just joined our group as staff member to work on the implementation of the LHC Field Model and the settings generation, activities that he already started when he was fellow in OP. This will strengthen our team and allow us to maintain a close link between optics files, optics corrections and what is used in controls in the CCC.
  MG discussed the main activities: 
  LHC sequences, followed up in of two branches, with an LHC as-designed and an as-built version. Both require some debugging.
  There has been further work on the MAD-X aperture model. LE interconnection cryostat data will be added soon.
  We are still awaiting tolerance number for the CMS CT2 region (after the meeting R. Veness communicated that the value of 9.8 mm should be used for the aperture computations. Such a value is then implemented in the official aperture model).
  A draft note on target beam parameters is in preparation.
  The preparation of files without pre-squeeze is in progress for IR2&8 and finished for IR1&5.
  JLN helps to prepare scripts for automatic file generation.
   
• CWG -> AR
  Brennan Goddard made new calculations for the protection by the TCDQ in case of an synchronous dump.
  Collimator commissioning is in progress. 
  
• LMC->FZ
  FZ reported from two LMC meetings, which took place on the 23 and 30 of September. Results from the FRESCA tests using an instrumented test version of a bad splice were presented by Luca Bottura and used for improved simulations of the splice quench behaviour to allow to predict current limits for thermal runaway.
  Arjian Verweij made also a presentation on simulation results, showing that at 3.5 TeV the situation in terms of risk of thermal runaway should be safe. This is not the case for 5 TeV.
  Detailed minutes with links to the slides presented are available from the web.

AOB

JJ reported that lead ions were successfully extracted from the SPS and for the first time passed through the transfer line up to the TED. The emittance was smaller than the design emittance.

Last update: 6-October-09

MG & HB

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