Abstract
Multiple charge heavy ion pulses were extracted from a plasma produced by an XeCl excimer laser beam at a relatively low flux (∼ 30 MW/cm 2) focused on Si, Ge, Mg and Zn targets. An output peak current of Si 3− ions of 375 mA was recorded at an acceleration voltage of 200 V only. The insertion of a variable capacitance between the target holder and the acceleration electrode allows a self-bunching of the ion beam. When a W target was used, a higher incident laser flux (∼ 90 MW/cm 2) was necessary in order to produce ions from it.
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