Beam emittance control in low-energy drift tube linac

With the use of an averaging technique over rapid oscillations a beam dynamics model is considered taking into account non-coherent bunch particle oscillations. Effective acceptance evaluation of the linac channel with axisymmetric RF focusing is carried out. Required restrictions imposed of linac parameters are formulated to ensure beam matching. It is shown that developed approach of beam dynamics analysis allows to realize effective beam emittance control.