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12th International Conference on Ion Sources (ICIS2007), Corée, République De (2007)
Development of a 1+/N+ setup for the production of multicharged radioactive alkali ions in SPIRAL
C. Eléon1, G. Gaubert1, P. Jardin1, M.-G. Saint-Laurent1, J. Alcantara1, R. Alvès Condé1, C. Barué1, D. Boilley1, J. C. Cornell1, P. Delahaye2, M. Dubois1, B. Jacquot1, P. Leherissier1, R. Leroy1, G. Lhersonneau1, M. Marie-Jeanne2
SPIRAL Collaboration(s)

In the framework of the production of radioactive ion beams by the isotope separator online method, a new system has been developed at GANIL/SPIRAL I to produce multicharged alkali ions. The principle, referred to as the “direct 1+/N+ method,” consists of a surface ionization source associated with a multicharged electron-cyclotron-resonance ion source without an intermediate mass separator. This new system has been tested online using a 48Ca primary beam at 60.3 A MeV. The experimental evidence of the direct 1+/N+ process has been obtained for a potential difference between the two sources of 11 V and with a 1+/N+ charge breeding efficiency of 0.04% for 47K5+. This value is significantly lower than the value of 6% obtained for stable K ions with the standard 1+/N+ method. A possible explanation is given in the text.
1 :  GANIL - Grand Accélérateur National d'Ions Lourds
2 :  CERN - European Organization for Nuclear Research
Physique/Physique/Physique des accélérateurs
Radioactive beams – Charged-particle beam sources and detectors – Ion sources: positive and negative – Charged-particle beams