Abstract
We have developed a high-current laser ion source for heavy ion fusion research based on induction accelerators. A frequency-doubled Nd:YAG laser irradiated a copper target with an intensity of 10 8–10 9 W/cm 2, producing plasmas composed of Cu + and Cu 2+ ions dominantly. The laser plasma supplied a large number of ions (∼10 14 ions/pulse) during several microseconds, which meets the requirement of heavy ion fusion. An inductive acceleration module extracted high-current ion beams over 0.1 A/cm 2 from a plasma-filled gap.
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