• V.S. Dyubkov, S.M. Polozov, A.V. Samoshin
  MEPhI, Moscow

At pre­sent a num­ber of high en­er­gy heavy ion lin­ear ac­cel­er­a­tor pro­jects are dis­cussed. FRIB ac­cel­er­a­tor is under R&D in Michi­gan Uni­ver­si­ty in USA, GANIL in France etc. The RIA (AEBF) pro­ject was de­signed in ANL, USA some years ago*. The linac should con­sist of a num­ber of ion sources, match­ing sys­tem, pre-bunch­er and high en­er­gy sec­tions. Using of in­de­pen­dent­ly phased short SC res­onators with drift tubes is pos­si­ble for beam ac­cel­er­a­tion and SC solenoids or quadru­ple can be used for fo­cus­ing. The al­ter­na­tive phase fo­cus­ing can be also use­ful**. The beam en­ve­lope con­trol is one of the main prob­lems in this linac. The method of an­a­lyt­i­cal­ly beam dy­nam­ics in­ves­ti­ga­tion will be dis­cussed in the fu­ture re­port. The con­di­tions of beam en­ve­lope con­trol will be car­ried out by using of es­pe­cial­ly av­er­ag­ing method, dis­cussed in*** ini­tial­ly.

* P.N.Ostroumov et al., Proc. of PAC01, p.4080
** E.S.Masunov, A.V.Samoshin, Proc. of PAC07, p.1568
*** V.S.Dyubkov, E.S.Masunov, Probl. of Atom. Sci.&Tech., Ser. Nucl. Phys. Investig. (in press)