Production of Highly Charged Heavy Ions by Means of a Hybrid Source in DC Mode and in Afterglow Mode
Abstract
Summary: An ECLISSE experiment has been carried out by coupling a laser ion source (based on a Nd:YAG laser (0.9 J/9 ns, laser power densities < 1011 W · cm−2) to the SERSE superconducting electron cyclotron resonance ion source. Continuous wave beams of highly charged ions from metal samples without the use of ovens or sputtering techniques were obtained under a variety of experimental conditions. The maximum charge states obtained from the ECRIS were 38+ for Ta and 41+ for Au. The peak current was obtained for 25+ and 29+, respectively, and it was in the order of some tens of µA. In this work the analysis of some preliminary results obtained in afterglow mode will also be presented. We employed microwave pulses (length 4 ms) and laser pulses (length 9 ns) with the same frequency (30 Hz) and variable relative phase. For appropriate phase values, a current enhancement of about one order of magnitude was observed.
The extraction electrode featuring the traces of deposited tantalum and gold.
