20171116-JleicBunchFormation
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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 :) (Todd Oct 10 collaboration meeting talk, slide 12)
- 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 (Ed, Todd)
- 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 (Vasiliy, Randy)
- 2153m circumference
- Bucket to bucket fast kicker injection
- h=28 capture, acceleration
- RF 27 adiabatic bunch splitting at top energy, h=28 to h=2*27=3584
- Bunch compression to 1-1.2cm design bunch length
- Barrier bucket, RF shifting as needed to adjust harmonic number (3580-3588)
- p: 7.061 to 100 GeV (8 to 100.938 GeV total E)
- Pb82+: 1.792 to 40 GeV (2.723 to 40.931 GeV total E)
- DC cooling at injection, ERL cooling at top energy
