Energy Evaluation of Pulsed Heavy Ion Beam produced by Bipolar Pulse Accelerator

Abstract

We demonstrated evaluation experiments of a prototype bipolar pulse accelerator (BPA) which produces an intense pulsed ion beam with higher purity than the conventional ion diode. The BPA achieves the high purity in principle by the two step acceleration with a bipolar pulsed voltage. With the bipolar pulse with the voltage of plus or minus 110 kV and pulse duration of about 70 ns, the ions from the gas puff nitrogen plasma source were successfully accelerated with the energy of the corresponding applied negative voltage of the bipolar pulse as the first step acceleration. The pulsed ion beam with current density of 70 A/cm2 was obtained at 48 mm downstream from the grounded anode surface with the appropriate time delay operation of the plasma source and the bipolar pulse generator.