Speaker
Description
Applied physics research at low and medium ion energies traditionally relies on large tandem electrostatic accelerators. A compact alternative using a 750-MHz radio-frequency quadrupole is under study. The efficient production and transport of suitable ion species for such accelerators is therefore of increasing interest. In particular, H⁺ and He²⁺ ions are relevant for ion beam analysis in materials science, while C⁶⁺ ions are of interest for cancer particle therapy. This paper details the performance of a 14.5-GHz electron cyclotron resonance ion source, a device typically optimised for high charge states in cyclotron injectors, for the production of intense, low-emittance proton, He²⁺ and C⁶⁺ beams suitable for compact linear accelerators. Experimental and simulation studies of plasma parameters, charge-state distributions, and beam quality were performed for hydrogen, helium and carbon gases. Optimised extraction and transport configurations are discussed, together with low-energy beamline designs for ion implantation and microprobe applications.
Funding Agency
Work supported by The Three Physicists Foundation grant.
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