1. J. Seeman Perugia Super-B Meeting June 2009
Injection Issues
J. Seeman
Perugia Super-B Meeting
June 2009
7/19/2019
Super-B Perugia

2. Super-B Parameter Options
7/19/2019
Super-B Perugia

3. New Parameters (comparison with March 09)
7/19/2019
Super-B Perugia

4. Potential LNF Super-B location (May)
(Tomassini, Raimondi,
and Sanelli, May 09)
7/19/2019
Super-B Perugia

5. Needed injection rates
N = 6 x 1010.
n = 1600
Lifetime = 5 min.
dN/dt = 1600*6 x 1010/5/60 = 3.2 x1011/sec
Inject each beam at 25 Hz
Inject, say, 5 bunches per pulse
Particles per inject bunch = 2.6 x 109
7/19/2019
Super-B Perugia

6. Injector RF Layout (Boni, Guiducci, Seeman) A B C D ACCELERATING FIELD
e- DR
> 4 GeV e- A B C D
GUN
SHB
L GeV
5.7 GeV
0.1GeV
0.8 GeV
> 7 GeV e+ PS
e+ DR
ACCELERATING FIELD
MEDIUM GRADIENT
HIGH GRADIENT
23 MV/m
26 MV/m
60 MW
klystron
50 MW
klystron
55 MW
45 MW X X
SLED
SLED
≈ 210 MeV
≈ 156 MeV

7. Injector and Linac Will the SLC polarized gun be adequate?
Can a short pulse polarized laser on the cathode make a 3 mm bunch?
Can the beam emittance from the gun be smaller?
Parameters of the spin rotators?
RF and structure design? (Boni)
Quadrupole lattice for the linac?
Quadrupole lattice for the transport lines?
Geometry of the transport lines?
Diagnostics needed?
Tolerances on magnets and RF?
7/19/2019
Super-B Perugia

8. Damping Rings Lattice (~54 m) (Guiducci) DR energy: 1 GeV or 800 MeV?
RF parameters?
Injection septa and kickers?
Vacuum system needed?
Tolerances of all magnets, RF, alignment?
7/19/2019
Super-B Perugia

9. Ring Injection Injection kicker design? Septa design?
Septa fringe fields on stored beam?
7/19/2019
Super-B Perugia

10. Injection R&D Items Make e+ at 100 MeV? Kickers at 10 nsec pulse?
Ceramic or stripline kicker?
Use DAFNE hall for DRs?
Gradient for e+ capture section?
Septum blade thickness?
How many bunches per injection pulse?
Accelerate train of high charge e- to make train of e+ bunches?
Highest beta-x at injection point: >250 m?
Transfer line design?
Bunch compressor?
DR optimum E?( >1 GeV?) Damp for two cycles?
Linac pulse length?
C band?
7/19/2019
Super-B Perugia