A Numerical Investigation on DC Induction Acceleration

The principle of direct‐current (DC) induction acceleration was numerically demonstrated using a three dimensional electromagnetic field simulator and a circuit simulator. Induction acceleration cells designed for DC acceleration accompanying with a racetrack‐shaped beam duct were modeled to investigate the electromagnetic field induced during beam acceleration and resetting of ferromagnetic cores. The simulation showed that leakage electric field induced in the beam duct during resetting was largely suppressed owing to the induced current flowing in the beam duct although it is not perfectly negligible. The equivalent circuit simulation using linear and nonlinear transformer models revealed also that the continuous operation time of the DC induction accelerator would be limited by the magnetic saturation of the ferromagnetic core of a magnetic flux storage placed along the beam duct to ensure the resetting of the induction cells.