title: Installation of a versatile multiaperture negative ion source.
abstract: Neutral Beam Injectors (NBI), which need to be strongly optimized in the perspective of DEMO reactor, request a thorough understanding of the negative ion source used and of the multi-beamlet optics. A relatively compact RF ion source, named NIO1 (Negative Ion Optimization 1), with 9 beam apertures for a total H(-) current of 130 mA, 60 kV acceleration voltage, is being installed at Padua, in Consorzio RFX, to provide a test bench for source optimizations in the framework of the accompanying activities in support to the ITER NBI test facility. NIO1 construction and status of the overall installation, including a high voltage deck and an optical cavity ring down spectrometer are here summarized and reported. Plasma and low voltage beam operations are discussed. Development of a sampling beam calorimeter (with small sampling holes, and a segmented cooling circuit) is also discussed.
authors.affiliation: INFN-LNL, viale dell'Universita` n. 2, 35020 Legnaro, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Cavenago
authors.affiliation: Consorzio RFX, Associazione EURATOM-ENEA sulla fusione, c.so Stati Uniti 4, 35127, Padova, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Serianni
authors.affiliation: Consorzio RFX, Associazione EURATOM-ENEA sulla fusione, c.so Stati Uniti 4, 35127, Padova, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Antoni
authors.affiliation: Consorzio RFX, Associazione EURATOM-ENEA sulla fusione, c.so Stati Uniti 4, 35127, Padova, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Barbisan
authors.affiliation: Consorzio RFX, Associazione EURATOM-ENEA sulla fusione, c.so Stati Uniti 4, 35127, Padova, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Bigi
authors.affiliation: Consorzio RFX, Associazione EURATOM-ENEA sulla fusione, c.so Stati Uniti 4, 35127, Padova, Italy.
authors.forename: M
authors.initials: M
authors.lastname: De Muri
authors.affiliation: INFN-LNL, viale dell'Universita` n. 2, 35020 Legnaro, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Fagotti
authors.affiliation: Consorzio RFX, Associazione EURATOM-ENEA sulla fusione, c.so Stati Uniti 4, 35127, Padova, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Fellin
authors.affiliation: INFN-LNL, viale dell'Universita` n. 2, 35020 Legnaro, Italy.
authors.forename: T
authors.initials: T
authors.lastname: Kulevoy
authors.affiliation: INFN-LNL, viale dell'Universita` n. 2, 35020 Legnaro, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Minarello
authors.affiliation: Consorzio RFX, Associazione EURATOM-ENEA sulla fusione, c.so Stati Uniti 4, 35127, Padova, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Pasqualotto
authors.affiliation: INFN-LNL, viale dell'Universita` n. 2, 35020 Legnaro, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Petrenko
authors.affiliation: INFN-LNL, viale dell'Universita` n. 2, 35020 Legnaro, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Poggi
authors.affiliation: Consorzio RFX, Associazione EURATOM-ENEA sulla fusione, c.so Stati Uniti 4, 35127, Padova, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Recchia
authors.affiliation: Consorzio RFX, Associazione EURATOM-ENEA sulla fusione, c.so Stati Uniti 4, 35127, Padova, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Rossetto
authors.affiliation: INFN-LNL, viale dell'Universita` n. 2, 35020 Legnaro, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Sattin
authors.affiliation: Consorzio RFX, Associazione EURATOM-ENEA sulla fusione, c.so Stati Uniti 4, 35127, Padova, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Valente
authors.affiliation: Consorzio RFX, Associazione EURATOM-ENEA sulla fusione, c.so Stati Uniti 4, 35127, Padova, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Veltri