Bunching and focusing of an intense ion beam for target heating experiments

An experiment to focus transversely and simultaneously axially bunch a space charge neutralized K⁺ ion beam has been carried out at LBNL. The principal objectives of the simultaneous bunching and focusing experiments are to control the beam envelope, demonstrate effective neutralization of the beam space- charge, control the velocity tilt on beam, understand effects of net defocusing, field imperfections, limitations on minimal spot size such as emittance and aberrations and to quantify the longitudinal phase space. A demonstration of increased axial compression and a reduction in spot size compared to earlier measurements is presented.