| Irfu-08-282
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| High intensity helium beam at CEA/SACLAY |
| R. Gobin, G. Adroit, F. Harrault, B. Pottin, Y. Sauce, F. Senée, O. Tuske |
| The Spiral 2 injector will be first built, installed and tested at CEA Saclay before its transfer to Caen. The RFQ has been designed to accelerate different particles: protons, deuterons and q/A = 1/3 heavy ions. The APhoenix
ion source developed and tested at LPSC
Grenoble will be directly transferred to Ganil. So to test the q/A = 1/3 ions acceleration with the RFQ built at Saclay, the light ion ECR source has been thought capable to produce 3He+ ions. Moreover, high intensity 3He ion beam accelerator applications are possible in other domains such as astrophysics or neutrino factory.
The SILHI source has been fed with natural helium
(4He) gas for several days. Beam intensity as high as 20 mA (110 mA/cm2 through 4.8 mm diameter aperture) has been extracted from the source with energy of 95 keV. Extensive experiments have been done with the 9 mm diameter nominal plasma electrode to characterize the He+ extracted beam. With the same extracted beam density, total beam intensity in the range of 100 mA seems reachable. In addition, simulations of the beam extraction will be done to estimate electrode modifications in order to improve the beam transport.
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