Development of a 1+ /N+ setup for the production of multicharged radioactive alkali ions in SPIRAL

C. Eléon (1) , G. Gaubert (1) , P. Jardin (1) , M.G. Saint-Laurent (1) , J.A. Alcantara-Nunez (1) , R. Alves Condé (1) , C. Barué (1) , D. Boilley (1) , J. Cornell (1) , P. Delahaye (2) , M. Dubois (1) , B. Jacquot (1) , P. Lehérissier (1) , R. Leroy (1) , G. Lhersonneau (1) , M. Marie-Jeanne (2) , L. Maunoury (3) , J.Y. Pacquet (1) , F. Pellemoine (1) , C. Pierret (3) , J.C. Thomas (1) , A.C.C. Villari (1)

1 GANIL - Grand Accélérateur National d'Ions Lourds
2 CERN - European Organization for Nuclear Research
3 CIMAP - UMR 6252 - Centre de recherche sur les Ions, les MAtériaux et la Photonique

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.

Domaines: Instrumentations et Détecteurs [physics.ins-det]

C. Eléon, G. Gaubert, P. Jardin, M.G. Saint-Laurent, J.A. Alcantara-Nunez, et al.. Development of a 1+ /N+ setup for the production of multicharged radioactive alkali ions in SPIRAL. Review of Scientific Instruments, 2008, 79, pp.02A904. ⟨cea-00275015⟩