Abstract
This paper makes use of the nonlinear δF formalism and the Vlasov–Poisson equations to describe the propagation of an intense, nonneutral ion beam through a periodic solenoidal focusing field in the thin–beam approximation. The nonlinear δF-formalism is developed for numerical simulation applications by dividing the total distribution function F b into a zero-order part ( F b 0) plus a perturbation ( δF b) which evolves nonlinearly in the zero-order and perturbed field configurations. To illustrate the application of the technique, nonlinear δF simulation results are presented for a thermal equilibrium background distribution F b 0( H ⊥) for the case of beam propagation through a uniform focusing field.
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