Wire focusing of hollow electron beams

Wire focusing of intense electron beams has been demonstrated to be a useful method of damping transverse motion. This paper reports the results of a new technique where inductance is coupled to the wire to control induced current and hence the focusing force. Using the IBEX (4 MeV, 20 ns pulse) accelerator in a foiless diode geometry, up to 35 kA has been injected into the wire cell. Beam diagnostics located at the terminus of the 60 cm long vacuum wire zone indicate typically >80% current transmission with a reduction of initial beam perturbations. Space charge limiting currents in this configuration is also discussed