EFFECT OF CAVITY COUPLERS FIELD ON THE BEAM DYNAMICS OF THE LCLS-II INJECTOR
2014
LCLS-IIisanewlightsourcebasedonacontinuouswave (cw) superconducting linac to be built at SLAC. The Injector section of the linac creates the elecron beam and accelerates it up to about 100 MeV. The couplers of the accelerating cavities produce an asymmetric field resulting in a beam offset and, most importantly, in a significant transverse emittance dilution, if not compensated. In this paper we describe the simulations of the LCLS-II injector taking into account the cavity couplers effect and some mitigation techniques to reduce its impact on the beam quality.
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