[en] Due to flashover problems, Austin Research Associates, Inc. may be forced to perform its proof-of-principle autoresonant collective ion acceleration experiment at electron beam parameters of 2.25 MeV and 15 kA rather than the intended 3.0 MeV and 30 kA. We show that the original experimental goals still can be achieved provided the beam radius is reduced by a factor of two and a thinner anode foil is employed. More generally, our parameter study suggests that operating with beams of smaller radii improves cyclotron wave behavior during beam adiabatic compression or expansion