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MAD-X Production Version 4 LHC Commissioning

MAD-X Production Version 4 LHC Commissioning. MAD-X must be stable for the LHC commissioning! No program development except: http://mad.web.cern.ch/mad/module_keepers/module_keepers.html Bug fixes Maintenance and speed-up Continue work on PTC module

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MAD-X Production Version 4 LHC Commissioning

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  1. MAD-X Production Version 4LHC Commissioning MAD-X must be stable for the LHC commissioning! No program development except: http://mad.web.cern.ch/mad/module_keepers/module_keepers.html Bug fixes Maintenance and speed-up Continue work on PTC module MAD-X Production Version 4.00.09 (newer version soon available!) Madx: Official production version Madx_old: Old production version with individual BV flag 3.04.53 Madx_dev: Development version Main new feature Eliminate individual BV flag and related bugs, in parallel fix LHC sequence files by Thys Risselada In fact, BEAM2 of LHC was not fully correct in MAD-X! Important!Thys created the official new LHC sequence files without individual BV flag while keeping the old ones for in the “obsolete” folder. MAD-X Frank Schmidt ABP

  2. BV Flag End of March I had convened a MAD-X meeting to outline the new MAD-X production version including the BV issue: http://frs.web.cern.ch/frs/MAD-X_minutes/Meeting-22/minutes.html Comments The use of the individual BV stops the execution of new MAD-X production version to avoid any confusion between code and LHC sequence versions. The main use of the BEAM BV Flag is for the LHC two-in-one. For actual studies we have created a FORWARD version of BEAM2 which we have called BEAM4 (provided in Thys’sLHC repository together with BEAM1 & 2). The conversion is now done via a script. The use of the BEAM BV Flag for other machines is okay but be aware that this may not be what you want, e.g. focusing quadrupoles become de-focusing quadrupoles so a Twiss output will be completely different for BV=+-1! The recommendation for an inversion of a line is to REFLECT the sequence and control signs of dipoles and quadrupoles manually. MAD-X Frank Schmidt ABP

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