Generation and transport of a low energy intense ion beam

Abstract

The paper deals with experiments on generation and transport of a low energy (60-100 keV), high density (10 - 30 A/cm/sup 2/), microsecond ion beam (IB) generated in a magnetically insulated diode (MID) with an active hydrogen-puff ion source. The convergent annular IB was initially ballistically focused then transformed into a paraxial cylindrical shaped beam and transported in vacuum to a distance >1 m with high efficiency using a combination of a concave toroidal magnetic lens and a straight solenoid. 2D one-particle computer simulations of the IB propagation in the lens/solenoid system supported the optimization of the system parameters.