Simulations of channel-based final beam transport

We present simulations of final-transport systems based on laser-initiated Z-discharge channels. The systems consist of several beams transported in quadrupole-channel arrays aiming at an adiabatic plasma lens, where they are combined, focused, and transported to the target through a laser-initiated discharge channel. Details of the magnetic-quadrupole beamlines and their interface with the plasma channel are shown. We also present preliminary hydrodynamic calculations to model pinching and current build-up in the laser-initiated discharge.