Revision as of 10:01, 16 November 2017

Nov 16 2017 JLEIC Ion Bunch Formation Meeting

• Todd, Yuhong, Jiquan, Ed, Randy (Vasiliy)

Objectives

• Summarize existing baseline bunch formation scheme
• Identify any concerns with existing baseline bunch formation scheme
• Develop short-term plans to address any concerns
• Document baseline bunch formation scheme (for TDR and Randy's dissertation)

Current baseline

• As Todd understands it :)
  • All energies are Kinetic!
  • All injection space charge limits are set to 0.15
• Linac (Brahim Oct 10 collaboration meeting talk)
  • 200 MHz microbunching structure from linac, up to 10 Hz
  • H-: 280 MeV
    • 2 mA, 0.5 ms, 1 uC (6.24e12)/pulse
    • 90% norm emit (2.3 pi-mm-mrad, 8.8 pi-ns-keV)
    • rms sigmaE/E 1.0e-4 (or lower, scaled)
  • Pb67+: 100 MeV/u
    • 0.5 mA, 0.5 ms, 0.25 uC (2.33e10)/pulse
    • 90% norm emit (0.8 pi-mm-mrad, 4.6 pi-ns-keV/u)
    • rms sigmaE/E 0.8e-4 (or lower, scaled)
    • Pb30+ to Pb67+ stripping at 13 MeV/u
• Booster
  • 280m circumference (Probably will go up)
  • Dispersive injection (Probably will shift to non-dispersive injection)
  • h=1 capture, acceleration, compression, and extraction
  • h=1 bunch rotation to match collider bucket for bucket to bucket transfer
  • p: 280 to 7061 MeV (1218 to 8000 MeV total E)
    • H- to p charge exchange injection, 350 turns, coasting beam
  • Pb67+: 100 to 1792 MeV/u (1031 to 2723 MeV/u total E/u)
    • Cooling pulsed injection, several pulses, coasting beam
    • Strip to Pb82+ in transfer line
• Collider
  • 2153m circumference
  • Bucket to bucket fast kicker injection
  • h=28 capture, acceleration
  • 2^7 bunch splitting at top energy
  • h=28 injection