High Brightness Accelerator for Warm Dense Matter Studies.

A high brightness heavy ion accelerator for creating powerful beams to study warm dense matter is being designed at LBNL. The components are an injector that delivers 0.1 $\mu $C of sodium beam, and an accelerator that boosts the energy to about 20 MeV. Further beam manipulations will compress the beam to a final spot radius of 1 mm and a pulse length of 1 ns. In order to reach those final parameters, it is required to extract a high brightness beam and minimize the transverse and longitudinal emittance growth along the accelerator. The injector is based on the Accel-Decel concept which enables the extraction of a high line charge density beam from the ion source, and the accelerator is based on the Pulse Line Ion Accelerator concept, which uses a slow-wave structure based on a helical winding, on which a voltage pulse is launched and propagated to generate the accelerating fields. We will present numerical simulations of the beam dynamics in this system.