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Prospect for a 60 GHz multicharged ECR ion source

Abstract : The conceptual design of a fourth generation hybrid electron cyclotron resonance (ECR) ion source operated at 60 GHz is proposed. The axial magnetic mirror is generated with a set of three Nb3Sn coils, while the hexapole is made with room temperature (RT) copper coils. The motivations for such a hybrid development are to study further the ECR plasma physics and the intense multicharged ion beams’ production and transport at a time when a superconducting (SC) hexapole appears unrealistic at 60 GHz. The RT hexapole coil designed is an evolution of the polyhelix technology developed at the French High Magnetic Field Facility. The axial magnetic field is generated by means of 3 Nb3Sn SC coils operated with a maximum current density of 350 A/mm2 and a maximum coil load line factor of 81%. The ECR plasma chamber resulting from the design features an inner radius of 94 mm and a length of 500 mm. The radial magnetic intensity is 4.1 T at the wall. Characteristic axial mirror peaks are 8 and 4.5 T, with 1.45 T minimum in between
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Submitted on : Thursday, October 19, 2017 - 9:58:14 AM
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T. Thuillier, D. Bondoux, J. Angot, M. Baylac, E. Froidefond, et al.. Prospect for a 60 GHz multicharged ECR ion source. 17th International Conference on Ion Sources (ICIS 2017), Oct 2017, Geneva, Switzerland. pp.052302, ⟨10.1063/1.5017113⟩. ⟨in2p3-01619126⟩



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