Charge breeding time studies with short pulse beam injection
Résumé
Investigations on the Charge Breeding (CB) time have been done with the
PHOENIX ECR Charge Breeder. The traditional measurement method
consists in generating a 1+ ion beam rise front and measuring the time to
reach 90% of the final steady N+ ion beam intensity. In order to study the
possible self-consistent effects of the accumulation of injected ions in the
plasma and to better understand the 1+N+ process, short 1+ pulses were
injected and the time resolved N+ beam responses were measured.
Several experimental campaigns were performed with different elements
and configurations. The effect of several parameters was studied like the
amplitude and the width of the pulse. The measurements were also used
to estimate the 1+N+ efficiencies in the case of radioactive species. The
new short pulse CB time method and the experimental results will be
presented