title: Use of the focusing multi-slit ion optical system at RUssian Diagnostic Injector (RUDI).
abstract: The upgrade of the diagnostic neutral beam injector RUDI in 2010 was performed to increase the beam density at the focal plane in accordance with the requirements of charge-exchange recombination spectroscopy diagnostics. A new focusing ion-optical system (IOS) with slit beamlets and an enlarged aperture was optimized for 50% higher nominal beam current and reduced angular divergence with respect to the previous multi-aperture IOS version. The upgraded injector provides the beam current up to 3 A, the measured beam divergence in the direction along the slits is 0.35°. Additionally, the plasma generator was modified to extend the beam pulse to 8 s.
authors.affiliation: Budker Institute of Nuclear Physics, 630090 Novosibirsk, Russian Federation. a.a.listopad@inp.nsk.su
authors.forename: A
authors.initials: A
authors.lastname: Listopad
authors.forename: J
authors.initials: J
authors.lastname: Coenen
authors.forename: V
authors.initials: V
authors.lastname: Davydenko
authors.forename: A
authors.initials: A
authors.lastname: Ivanov
authors.forename: V
authors.initials: V
authors.lastname: Mishagin
authors.forename: V
authors.initials: V
authors.lastname: Savkin
authors.forename: B
authors.initials: B
authors.lastname: Schweer
authors.forename: G
authors.initials: G
authors.lastname: Shulzhenko
authors.forename: R
authors.initials: R
authors.lastname: Uhlemann