Anode discharge to facilitate cathode plasma formation for generation of H#x2212;, C#x2212;, F#x2212;, I#x2212; and Pb#x2212; ions

摘要

Experimental studies of cathode plasma formation to generate high-power negative ion beams of varions elements in a coaxial magnetically insulated pulsed diode are presented. The vacuum spark discharge outside the anode was used to facilitate cathode plasma formation with high content of H−, C−, F−, I− and Pb− ions. The main mechanism responsible for cathode plasma formation is cathode bombardment by positive ions accelerated from anode plasma by the main pulse accelerator voltage.