title: Operational test of micro-oven for 48Ca beam.
abstract: In order to supply a high-intensity and stable (48)Ca beam from the RIKEN 18-GHz electron cyclotron resonance ion source, we are conducting operational tests of a micro-oven. A mixture of CaO and Al powders is placed into the crucible of the micro-oven and heated to produce metallic calcium by a reductive reaction. The successful production of a calcium beam was confirmed. In addition, we reduced the material consumption rate by using a so-called "hot liner," and we enhanced the beam intensity by applying a negative voltage bias to the micro-oven, the effect of which is similar to the effect of a "biased disk."
authors.affiliation: RIKEN Nishina Center, Wako, Saitama, 351-0198, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Ozeki
authors.affiliation: RIKEN Nishina Center, Wako, Saitama, 351-0198, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kageyama
authors.affiliation: RIKEN Nishina Center, Wako, Saitama, 351-0198, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kidera
authors.affiliation: RIKEN Nishina Center, Wako, Saitama, 351-0198, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Higurashi
authors.affiliation: RIKEN Nishina Center, Wako, Saitama, 351-0198, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nakagawa