title: A compact source for bunches of singly charged atomic ions.
abstract: We have built, operated, and characterized a compact ion source for low-energy bunches of singly charged atomic ions in a vacuum beam line. It is based on atomic evaporation from an electrically heated oven and ionization by electron impact from a heated filament inside a grid-based ionization volume. An adjacent electrode arrangement is used for ion extraction and focusing by applying positive high-voltage pulses to the grid. The method is particularly suited for experimental environments which require low electromagnetic noise. It has proven simple yet reliable and has been used to produce μs-bunches of up to 10(6) Mg(+) ions at a repetition rate of 1 Hz. We present the concept, setup and characterizing measurements. The instrument has been operated in the framework of the SpecTrap experiment at the HITRAP facility at GSI/FAIR to provide Mg(+) ions for sympathetic cooling of highly charged ions by laser-cooled (24)Mg(+).
authors.affiliation: Institut für Angewandte Physik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Murböck
authors.affiliation: Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Schmidt
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: Z
authors.initials: Z
authors.lastname: Andelkovic
authors.affiliation: Institut für Angewandte Physik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Birkl
authors.affiliation: Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
authors.forename: W
authors.initials: W
authors.lastname: Nörtershäuser
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Vogel