title: Particle transport and heat loads in NIO1.
abstract: NIO1 is a compact radio frequency ion source designed to generate a 60 kV-135 mA hydrogen negative ion beam and it aims at continuous operation, which implies a detailed thermo-mechanical analysis of the beam-facing components, in particular, the accelerator grids. A 3D analysis of the entire NIO1 beam has been performed for the first time with a fully 3D version of EAMCC, a relativistic particle tracking code for the calculation of the grid power deposition induced by particle impacts. According to the results presented in this paper, secondary and co-extracted electrons cause a non-negligible heat load on the grids, where different high-power density regions, within reasonable sustainable standard limits, are calculated.
authors.affiliation: Consorzio RFX (CNR, ENEA, INFN, Università di Padova, Acciaierie Venete) Corso Stati Uniti 4, 35127 Padova, Italy.
authors.forename: N
authors.initials: N
authors.lastname: Fonnesu
authors.affiliation: INFN-LNL, viale dell'Università 2, 35020 Legnaro, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Cavenago
authors.affiliation: Consorzio RFX (CNR, ENEA, INFN, Università di Padova, Acciaierie Venete) Corso Stati Uniti 4, 35127 Padova, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Serianni
authors.affiliation: Consorzio RFX (CNR, ENEA, INFN, Università di Padova, Acciaierie Venete) Corso Stati Uniti 4, 35127 Padova, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Veltri