Summary Notes of the MAD-X meeting held on 5 September 2005

Present:

  • O.Berrig, H.Burkhardt, M.Giovannozzi, J.Jowett, A.Koschik, L.Neukermans, S.Redaelli, T.Risselada, F.Schmidt

    1) Version 3.00

  • PTC is now officially integrated in MAD-X. Version 3.00 contains a recent PTC version.
  • ptc-twiss with initial coordinates has been tested (HB). JJ requested printing of eigenvalues etc.
  • ptc-track is in progress, yet to be tested. Beam-beam may be added in the future.
  • ptc-matching has not yet been done.
  • IBS has been improved (FZ). Vertical dispersion has been included.
  • SELECT, FLAG=MAKETHIN has been completely rewritten (HB). The new version is not compatible with the old one (a new slicing file is available in the LHC V6.5 directory). N.B.: Single or double quotes are not required around names in selections by class or pattern. MAD-X converts names without quotes to lowercase (and NOT to uppercase as in MAD-8). There are no quotes in the LHC sequence files.
  • RdM's new matching procedure will be included later.

    2) MAD-X Day

  • To be held on September 23d in the building 6 auditorium.
  • Version 3.00 will be officially announced.
  • Expected participation from other labs: E.Forest, A.Lehrach, N.Malitsky, C.Milardi

    3) Makethin bug (HB)

  • FLATTEN before a MAKETHIN was found to cause a shift of the longitudinal positions of the magnet slices (TR). All slices of a magnet are displaced by the same distance, up to 5 mm in the LHC.
  • Helmut found exponential formats with only 6 decimal digits in the program code. These are most likely responsible for this bug (confirmed after the meeting) and will have to be changed.

    T.R.