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Agenda

Agenda. Ongoing work Special Topic : MAD-X for Non-LHC Applications AOB. On-going Work I. Core program Problem of reporting proper location of freshly and correctly installed elements (courtesy HG)

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Agenda

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  1. Agenda • Ongoing work • Special Topic: MAD-X for Non-LHC Applications • AOB MADX monthly meeting

  2. On-going Work I • Core program • Problem of reporting proper location of freshly and correctly installed elements (courtesy HG) • Very serious core bug! In very complicated seqedit structures installing elements  Crash due to incomplete code (courtesy HG) • 10’000 character limit in macros  Crash (courtesy HG) • Werner’s improved readtable • Further work on clean-up compiler warnings (FS) MADX monthly meeting

  3. On-going Work II • Makefile maintenance(on MAC etc) (FS) • Dynap module (FZ) • Second particle not tracked for Lyapunov • Improved Chaos detection • Bug introduced and fixed • Emit Module • Unintialized variable (FS) • Bug found by Rogelio  Fix delayed by 6 months MADX monthly meeting

  4. On-going Work III • Plot • “no haxis” bug introduced in clean-up (FS) • Flushing missing fixed Linux & Windows (Riccardo) • Ps file for tracking (Riccardo) • Gxx11 (subtle C problem courtesy HG) • Tedious Review of coordinate system for the track module (AK, AV, FS) • PAC05 Contribution all MAD-X publications onWeb • MAD8 to MAD-X conversion hints on the Web MADX monthly meeting

  5. Special Topic:MAD-X for Non-LHC Applications • MAD8 is dead! • MAD-X has taken over for the LHC • PTC is our upgrade path and it is ideal for transfer lines and small machines. Etienne helps day & night! • Advantages: better physics models, Normal Form and parameter dependence, acceleration is integral part… • Docu will come after PTC match and ptc_track work • But: active participation is needed!! MADX monthly meeting

  6. What can be expected • Solid core in C (mind you, 1 major bug per month!). Core is rather complex • One custodian and a team of module keepers • New modules (C or FORTRAN) can easily be added • Most MAD8 features have been ported to MAD-X (exceptions see below) • PTC is upgrade path  fix deficiencies of MAD-X • but modules using PTC have to be written by us!! MADX monthly meeting

  7. Missing features in MAD-X • All the following items are due to early MAD-X design decisions! • Thick lens tracking since not symplectic PTC_track • LieAlgebra (Dynamic, Static) and Harmon Module PTC NormalForm • Acceleration (doubtful coding!) • Proper Coding in MAD-X (needs a volunteer!) • PTC • MAD-X is stricter!! No negative driftlengths allowed! MADX monthly meeting

  8. What is different to MAD8 • All the MAD-X team including the custodian will be busy with LHC commissioning. PTC modules will have precedence • Module keeper succession is a continuous struggle (plot, matching!!!) • It is not realistic to come with a long “shopping list” of improvement requests and in particular concerning the core • The MAD-X framework is sound and it is supported. Moreover, it has in PTC a very powerful extension path • BUT, for anything beyond the direct needs of the LHC active participation in form of offering module keepers is mandatory • Moreover, there is no dedicated developer (C & Fortran) like we had with Eric d’Amico! (There will be a 6 month Asian fellow on PTC issues) MADX monthly meeting

  9. AOB • The modified “mad” script: • “mad” invokes MAD-X • “mad –new” invokes MAD8 • The “-new” flag is misleading. Shall I change that to • “-mad8”??? MADX monthly meeting

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