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

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

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

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

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

Injector RF Layout (Boni, Guiducci, Seeman) A B C D ACCELERATING FIELD e- DR > 4 GeV e- A B C D GUN SHB L - 0.8 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

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

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

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

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