Charge Breeding Technique at GANIL: Commissioning of the SPIRAL1 Charge Breeder and New 1+/n+ Test Bench
Résumé
The 1+/n+ method, early developed at the LPSC laboratory, is implemented at GANIL for
the production of radioactive ion beams as well as for studying the production of intense
stable metallic beams.
Regarding radioactive ion beam production, the SPIRAL1 charge breeder has been installed
in the midst of the SPIRAL1 LEBT. Many modifications of the beam line and the ancillaries
have been done to host the charge breeder. The first beam of 40Ar was extracted during May
demonstrating a distribution peaked on the 9+ charge state with 16% in particle of ionization
efficiency.
Concerning stable ion beam production, the GTS ion source, providing stable ion beam for
the ARIBE facility, is under modification to include a charge breeding capability. The idea
is to test the 1+/n+ method as an additional particle injection technique to produce high
intensity metallic beam. Due to its high global efficiency (around 50%) and narrower charge
state distribution, this technique has to be investigated to compete in numerous cases with
the conventional methods: oven – sputtering – MIVOC.
This contribution will present preliminary results of the SPIRAL1 charge breeder set in its
final location (SPIRAL1 facility) as well as the description of the 1+/n+ test bench for the
production of intense metallic ion beam.