title: Characterization of the versatile ion source and possible applications as injector for future projects.
abstract: The versatile ion source (VIS) is an off-resonance microwave discharge ion source which generates a slightly overdense plasma (n(e) ≈ 10(17) cm(-3)) operating at 2.45 GHz and producing more than 50 mA of proton beams. A detailed characterization of the source, by operating between 60 and 75 kV, in terms of emittance, current extracted and proton fraction is reported below. Moreover, passive techniques (alumina coating of the plasma chamber walls, BN disks at the injection and extraction endplates) have been used to improve the performance of the source, increasing the electron density for a more efficient ionization. The know-how achieved with the VIS source may be useful for the different project, particularly for the European spallation source.
authors.affiliation: INFN, Laboratori Nazionali del Sud, via S. Sofia 62, 95123, Catania, Italy. rosalbamiracoli@lns.infn.it
authors.forename: R
authors.initials: R
authors.lastname: Miracoli
authors.forename: L
authors.initials: L
authors.lastname: Celona
authors.forename: G
authors.initials: G
authors.lastname: Castro
authors.forename: D
authors.initials: D
authors.lastname: Mascali
authors.forename: S
authors.initials: S
authors.lastname: Gammino
authors.forename: D
authors.initials: D
authors.lastname: Lanaia
authors.forename: R
authors.initials: R
authors.lastname: Di Giugno
authors.forename: T
authors.initials: T
authors.lastname: Serafino
authors.forename: G
authors.initials: G
authors.lastname: Ciavola