Speaker
Description
The SPIRAL1 charge breeder (SP1CB) is under
operation. Radioactive ion beam (RIB) has already
been delivered [1] to Physicist for experiments.
Although charge breeding efficiencies demonstrated
high performances for stable ion beams, those
efficiencies regarding RIB are lower. The beam optics,
prior to the injection of the 1+ ions into the SP1CB, is
of prime importance [2] for getting such high
efficiencies. Moreover, the intensities of the
radioactive ion beams are so low, it is really difficult
to tune the SP1CB. A stable beam having a close B
is required to find out the set of optic parameters
preceding the tuning of the RIB. Hence, it has been
decided to focus our effort on that issue as to get
control of the 1+ beam optics leading to high charge
breeding efficiencies whatever the 1+ mass, energy
and Target Ion Source System used (TISS). Being
aware that TISS's provide ion beams with a specific
energy spread and knowing that the acceptance
energy of the SP1CB is rather narrow; that parameter
must play also a role in the charge breeding
efficiency. This contribution will show the strategy
undertaken to overcome that problem and the results
already obtained.