Method for minimization of the beam phase volume growth on the post-stripping section of the UNILAC

The method for determination of the optimum parameters of the matching line of UNILAC post-stripping section (Alvarez structure) is presented. The distinctive feature of this method is the fact that the object of minimization is a numerical model for calculation of the dynamics of realistic beam in the realistic accelerating fields. Such approach allows solving optimization problems in the full setting of the problem. There exist no limitations on the kinds of devices being optimized: magnetic quadrupoles, accelerating gaps etc. It is possible to carry out simultaneous optimization of the matching line parameters and values of magnetic lens quadrupole gradients along the accelerating section. Calculation of the optimum parameters of the marching line for the measured Ar+10 beam distribution is presented with the current of 10 emA; for the calculated parameters output beam parameters are presented