R&D ON STRIPLINES FOR THE CLIC DR KICKERS. C. Belver -Aguilar ( IFIC) Acknowledgements : A . Faus-Golfe (IFIC), F. Toral (CIEMAT), M. Barnes (CERN) . ICFA Beam Dynamics Mini Workshop on Low Emittance Rings 2011
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C. Belver-Aguilar (IFIC)
Acknowledgements: A. Faus-Golfe (IFIC),
F. Toral (CIEMAT), M. Barnes (CERN)
ICFA Beam Dynamics Mini WorkshoponLowEmittanceRings 2011
3-5 October 2011 Heraklion, Greece
The CLIC designreliesonthepresence of PDRs and DRstoachievetheverylowemittanceneeded.
Kickers are requiredtoinjectbeaminto and extractbeamfromthe PDR and DR
Lorentzforceoverthechargedparticles of thebeam:
for a TEM mode
2 modes of kickeroperation: odd and evenmode
-veSTRIPLINE KICKER OPERATION
Beam pipe Ground
Beam pipe Ground
onlyduring 0.01% of a periodthekickerworksout in theoddmode
STRIPLINE CROSS SECTION: defines thecharacteristicimpedance of thestriplines and thehomogeneity of thefield.
Twotypes of vacuumchamberhavebeenstudied: CYLINDRICAL and RACETRACK vacuumchamber.
betterfromthebeamimpedancepoint of view
Optimizedgeometry in ordertoachieve Z0 = (50 ± 1) Ω and thefieldhomogeneityrequired
Z0o = 49.5 Ω
BEAM IMPEDANCE: defines theinteraction of thebeamwiththekicker, resulting in beamenergylost and a beamshapeperturbation.
Longitudinal beam coupling impedance for untapered (Chao) and tapered stripline kicker (S. Smith, SLAC):
How can wedecreasethe longitudinal beamimpedance?
Optimizingthekickergeometry in ordertoachieve 50 Ωevenmodecharacteristicimpedance,
Thanksto C. Zannini and G. Rumolowhohelped me tolearn CST Particle Studio.