Development of a 1+/N+ setup for the production of multicharged radioactive alkali ions in SPIRAL.
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.
Eléon
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GANIL CEA/DSN-CNRS/IN2P3, Bd H Becquerel, BP 55027, Caen Cedex 5, France. eleon@ganil.fr
Gaubert
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Jardin
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Saint-Laurent
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Alcantara
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Alvès Condé
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Barué
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Boilley
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Cornell
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Delahaye
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Dubois
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Jacquot
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Leherissier
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Leroy
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Lhersonneau
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Marie-Jeanne
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Maunoury
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Pacquet
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Pellemoine
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Pierret
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Thomas
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Villari
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