摘要
The nonlinear space charge effect of bunched beam in linac is one of the im-portant factors that induces the emittance growth due to the conversion of the field en-ergy to kinetic energy.In this paper,the internal field energies associated with sometransverse nonuniform space charge distributions of a bunched beam,such as Gaussiandistribution,waterbag distribution and parabolic distribution,are worked out.And theemittance growth caused by these nonuniformities are obtained.
The nonlinear space charge effect of bunched beam in linac is one of the im- portant factors that induces the emittance growth due to the conversion of the field en- ergy to kinetic energy.In this paper,the internal field energies associated with some transverse nonuniform space charge distributions of a bunched beam,such as Gaussian distribution,waterbag distribution and parabolic distribution,are worked out.And the emittance growth caused by these nonuniformities are obtained.
基金
The project supported by China Science Foundation of Nuclear Industry
