title: Electron cyclotron resonance 140 mA D(+) beam extraction optimization for IFMIF EVEDA accelerator.
abstract: Based on the experience of the SILHI electron cyclotron resonance (ECR) ion source for the IPHI accelerator, which produces routinely 100-120 mA H(+) beam, the CEA-Saclay is in charge of the design and realization of the 140 mA cw deuteron source for the IFMIF project (International Fusion Materials Irradiation Facility). IFMIF is an accelerator-based neutron irradiation facility consisting of two accelerators of 125 mA D(+) beam at 40 MeV that hit in parallel a lithium target. IFMIF utilizes the deuteron-lithium (d-Li) neutron, producing a reaction to simulate the 14 MeV neutron environment in deuterium-tritium (D-T) fusion reactors. In the framework of the IFMIF EVEDA phase (Engineering Validation and Engineering Design Activities), we are studying a cw ECR ion source with a new extraction system to allow high current extraction while keeping a low divergence as well as a small emittance. Starting from SILHI five-electrode system with H(+) ions, the extracted beam characteristics as well as electric field conditions are compared with the cases of four- and three-electrode extraction systems. Experimental results made on the SILHI source with H(+) ions are briefly discussed. Extensive experimental results on the new source test bench BETSI are expected as soon as the design and fabrication of a dedicated extraction system with a new set of electrodes will be finished.
authors.affiliation: Commissariat à l'Energie Atomique (CEA)-Saclay, DSM/DAPNIA, Gif sur Yvette Cedex, France. odelferriere@cea.fr
authors.forename: O
authors.initials: O
authors.lastname: Delferrière
authors.forename: D
authors.initials: D
authors.lastname: De Menezes
authors.forename: R
authors.initials: R
authors.lastname: Gobin
authors.forename: F
authors.initials: F
authors.lastname: Harrault
authors.forename: O
authors.initials: O
authors.lastname: Tuske