Influence of the injected beam parameters on the capture efficiency of an electron cyclotron resonance based charge breeder

Abstract : Electron cyclotron resonance ion sources based charge breeders (ECR-CB) are fundamental devices for Isotope Separation On Line (ISOL) facilities aiming at postaccelerating radioactive ion beams (RIBs). Presently, low intensity RIBs do not allow a conventional tuning of the ECR-CB: as a consequence, it has to be set with a stable 1+ pilot beam first, switching then to the radioactive one without changing any parameter; this procedure is usually called “blind tuning.” Besides having different masses, pilot and radioactive beams can also differ in terms of the rms transverse emittance εrms and/or longitudinal energy spread ΔE, so the choice of a given pilot beam can determine the overall performances of the final breeding stage. This paper shows a numerical study of how the capture efficiency of the PHOENIX charge breeder is affected by the aforementioned beam paramaters: the analysis reveals the two-step nature of the process, highlighting the role of the injection optics and the plasma capture capability in the overall performances of this device. The simulations predict highest efficiency for εrms<5π  mm mrad and ΔE<5  eV in a optimum energy range between 2 and 6 eV, thus giving important information on the possibility of blindly tuning an ECR-CB. No isotopical effects were observed, while it clearly came out the necessity to improve the 1+ beam characteristics with a rf beam cooler prior to the injection into an ECR-CB.
Type de document :
Article dans une revue
Physical Review Special Topics: Accelerators and Beams, American Physical Society, 2017, 20, pp.063401
Liste complète des métadonnées

http://hal.in2p3.fr/in2p3-01540486
Contributeur : Emmanuelle Vernay <>
Soumis le : vendredi 16 juin 2017 - 13:37:37
Dernière modification le : mardi 22 mai 2018 - 21:48:11

Identifiants

  • HAL Id : in2p3-01540486, version 1
  • INSPIRE : 1605259

Collections

Citation

A. Galatà, D. Mascali, G. Torrisi, L. Neri, L. Celona, et al.. Influence of the injected beam parameters on the capture efficiency of an electron cyclotron resonance based charge breeder. Physical Review Special Topics: Accelerators and Beams, American Physical Society, 2017, 20, pp.063401. 〈in2p3-01540486〉

Partager

Métriques

Consultations de la notice

165