Eléon C, Gaubert G, Jardin P, Saint-Laurent M-G, Alcantara J, Alvès Condé R, Barué C, Boilley D, Cornell J C, Delahaye P, Dubois M, Jacquot B, Leherissier P, Leroy R, Lhersonneau G, Marie-Jeanne M, Maunoury L, Pacquet J-Y, Pellemoine F, Pierret C, Thomas J C, Villari A C C
GANIL CEA/DSN-CNRS/IN2P3, Bd H Becquerel, BP 55027, Caen Cedex 5, France.
Rev Sci Instrum. 2008 Feb;79(2 Pt 2):02A904. doi: 10.1063/1.2819738.
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 (48)Ca 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 (47)K(5+). 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.
