Analytical Formulas for Short Bunch Wakes in a Flat Dechirper

Bane, Karl¹  Stupakov, Gennady¹  Zagorodnov, Igor² 

[1] SLAC National Accelerator Lab., Menlo Park, CA (United States);Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)

关键词: COMPARATIVE EVALUATIONS;    APPROXIMATIONS;    ACCURACY;    ANALYTICAL SOLUTION;    MATHEMATICAL MODELS;    BEAM DYNAMICS;    PLATES;    FREE ELECTRON LASERS General Physics;    ACCPHY;   

DOI  :  10.2172/1245114
RP-ID  :  SLAC--PUB-16497
PID  :  OSTI ID: 1245114
Others  :  Other: arXiv:1603.07411
Others  :  TRN: US1601176

学科分类：核物理和高能物理

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来源: SciTech Connect

【 摘 要 】

We develop analytical models of the longitudinal and transverse wakes, on and off axis for realistic structures, and then compare them with numerical calculations, and generally find good agreement. These analytical "first order" formulas approximate the droop at the origin of the longitudinal wake and of the slope of the transverse wakes; they represent an improvement in accuracy over earlier, "zeroth order" formulas. In example calculations for the RadiaBeam/LCLS dechirper using typical parameters, we find a 16% droop in the energy chirp at the bunch tail compared to simpler calculations. With the beam moved to 200 m from one jaw in one dechiper section, one can achieve a 3 MV transverse kick differential over a 30 m length.