Induction accelerator test module for HIF

An induction linac test module suitable for investigating the drive requirements and the longitudinal coupling impedance of a high-power ion induction linac has been constructed by the heavy ion fusion (HIF) group at LBL (Lawrence Berkeley Laboratory). The induction linac heavy ion driver for inertial confinement fusion (ICF) as presently envisioned uses multiple parallel beams which are transported in separate focusing channels but accelerated together in the induction modules. The resulting induction modules consequently have large beam apertures-1-2 m in diameter-and correspondingly large outside diameters. The module geometry is related to a low-frequency gap capacity and high-frequency structural resonances, which are affected by the magnetic core loading and the module pulser impedance. A description of the test module and preliminary results are presented.<>