Magnetic trapping of intense ion beams

Intense light-ion beam sources are being developed for the inertial confinement fusion program. The possibility of trapping converging ion beams from such sources by imposition of a strong local mirror magnetic field in the target region and by using a thin stripping foil to suddenly increase the ionic charge is investigated. Applications of this concept include generation of compact hot ion rings for MFE studies, generation of intense K-shell radiation sources, and heating thin foils to drive ICF targets. In the last application, the trapped ions reflex through the foil several times, leading to enhanced deposition and heating. Here, we report on scoping studies of the problem: the stripping, trapping, and energy deposition of a 5.0 MeV Lithium beam. We assume that the Lithium ions are initially singly ionized and that they are ballistically focused onto the target foil.