bmad_4170_2ma_120505.lat

October 3, 2005 Lattice: /nfs/cesr/user/dlr/lat/bmad_4170_2ma_120505.lat

• Design strategy: Derived from bmad_4160_2ma_113005, which is the lrbbi compensated version of bmad_4160_111005.lat
• This lattice is very similar to bmad_4160_2ma_113005.lat, which is described on the lower half of this page
• Unless otherwise noted, all quantities below are computed for train 1, bunch 3, assuming 9X5X2ma in other beam.

• linear lattice constraints
• non linear lattice constraints

• lattice file
• Optical parameters and orbits
  • table
  • Lattice gif

  • Parasitic crossing parameters
    • Luminosity pretzel - pc parameters , b_param

  • Dynamic aperture
    122205 and initialization energies 0.0 0.003 0.006, Qx=0.518,Qy=0.584, Qz=-0.089, and yes this does include parasitic beambeam kicks, with tracked particles assumed to be in train 1 bunch 3 and 9X5X2mA in opposite beam

  • Parameters for beam-beam simulation including radiation integrals, damping decrement, etc.
  • Closed orbit output
  • c12_c22 in IR
  • Dispersion with vertical separators off
  • Dispersion with vertical separators on

  Single particle scans

  • 111105 and initialization , fs=-0.089, positrons, nolrbbi, no beambeam_ip, lat_and_layout (including apertures)

  Best luminosity to date is with 8X3 and two bunches missing (22 bunches/beam), day 2 of 2006. Electron current is about 2/3 positron current. Luminosity per bunch vs average bunch current and simulation 120205 is day 2 luminosity .