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PTC-ORBIT code for LHC injectors … current status …

PTC-ORBIT code for LHC injectors … current status …. Alexander Molodozhentsev (KEK) December 8, 2011. CERN: Space Charge Group Meeting#7 / ICE / BE-ABP. PTC-ORBIT structure … v.10122011. MADX(PTC)  lattice description (STATIC)  PTC-FLAT-FILE should be produced … PTC-ORBIT(MPI)

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PTC-ORBIT code for LHC injectors … current status …

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  1. PTC-ORBIT code for LHC injectors… current status … Alexander Molodozhentsev (KEK) December 8, 2011 CERN: Space Charge Group Meeting#7 / ICE / BE-ABP

  2. PTC-ORBIT structure … v.10122011 • MADX(PTC)  lattice description (STATIC)  PTC-FLAT-FILE should be produced … • PTC-ORBIT(MPI)  ORBIT script  TIME tables for the each (any) elements of machine  Activate ‘TIME-dependence’ … ‘DYNAMIC’ lattice  6D particle distribution  SpaceCharge ORBIT module … + Diagnostic  … TRACKING procedure

  3. PTC-ORBIT status… v.10122011 • CERN cluster: • PTC-ORBIT(MPI) has been installed and compiled … • Path to the executable file (lxplus.cern.ch): /afs/cern.ch/project/lhcnap/nap2/user/amolodoz/CODES/ START-PTC101211-ORBIT10-xe11.2.137 • Examples: CERN PS Booster /afs/cern.ch/project/lhcnap/nap2/user/amolodoz/RUNS/2011/November/PSB/Chicane_RF/12-01-11/FK-Chicane-RF-Basic  … available through the ‘CERN Space Charge Group’ home-page CERN PS /afs/cern.ch/project/lhcnap/nap2/user/amolodoz/RUNS/2011/November/PS/Chicane/12-05-11/NO-RFTable • Training (period: Nov.28 – Dec.7) PSB  7h / PS  4h / SPS  2h

  4. PTC … & PTC-ORBIT … • … /afs/cern.ch/project/lhcnap/nap2/user/amolodoz/RUNS/2011/November/PTC-About PTC report … KEK2002 PTC-ORBIT report … KEK 2007

  5. CERN PS booster … part of the PSB lattice Chicane+FastKickers + RFsystem CHICANE Bump Magnets • DYNAMIC variation of the magnets • RF Table with the 2nd harmonic

  6. CERN PS Booster: BS_ramp.TXT Particle tracking with the initial time of 0 msec 2 1 1 1 0.0 0.17824890 0.0 0.0005 0.000 0.0 ‘Chicane’ bump variation 0.5msec ‘Fast’ kickers variation PTC-ORBIT Particle tracking with the initial time of 1msec

  7. CERN PS Booster: RF test … RF Table V1 = 8 kV V2 = 24 kV RF Table (example) … RF_DOUBLEHARM_NOACC.TXT 2 1 1 0 2 1 2 0.0 0.1600 -0.008 0.0 0.024 0.0 0.010 0.1600 -0.008 0.0 0.024 0.0 PTC-ORBIT Single particle tracking … phi0=3.0rad / dW=0.0GeV

  8. CERN PS Booster:‘shot-term’ plan till Dec.15, 2011 (with Michel Martini) • 6D multi -particle tracking by PTC-ORBIT (obtained after the MT injection process …) • … NO Space charge … effect of the chicane on the transverse emittance of the beam … basic beam diagnostic … • … Introduce the ‘Space Charge’ module of the code … … ‘first touch’ of the task …

  9. CERN PS … injection chicane PS$START (beginning of lattice): PI.BSM40 PI.BSM43 … COD at PI.BSM42 Maximum strength of {BSM} PI.BSM42 PI.BSM44

  10. CERN PS … DYNAMIC chicane variation  Variation of COD at RNG$START ‘Realistic’ time tables of each BSM … prepared by S.Gilardoni (May2011) Observation: RNG$START PTC-ORBIT

  11. CERN PS … DYNAMIC chicane variation PS RF system … fundamental harmonic Phi=0, dE=0 Phi=2.8 rad, dE=0 PTC-ORBIT Effect of the chicane (‘path length’ variation) …

  12. CERN PS:‘shot-term’ plan till Dec.15, 2011 (with Raymond Wasef) • Single particle tracking using the existing machine description  ‘pole winding’  high-order field components …  ‘chicane’ effect … distortion the machine super-periodicity Expected result: tune-scanning and the ‘beam-survival’ study (with the realistic physical aperture) • 6D multi -particle tracking by PTC-ORBIT (obtained after the MT injection process …) • … NO Space charge ( 2000 turns  … >> NSYNCH) … the dilution of the transverse emittance of the beam (vz working point) … basic beam diagnostic … • … Introduce the ‘Space Charge’ module of the code … … ‘first touch’ of the task …

  13. CERN SPS • … make it running …

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