title: Cryogenic linear Paul trap for cold highly charged ion experiments.
abstract: Storage and cooling of highly charged ions require ultra-high vacuum levels obtainable by means of cryogenic methods. We have developed a linear Paul trap operating at 4 K capable of very long ion storage times of about 30 h. A conservative upper bound of the H(2) partial pressure of about 10(-15) mbar (at 4 K) is obtained from this. External ion injection is possible and optimized optical access for lasers is provided, while exposure to black body radiation is minimized. First results of its operation with atomic and molecular ions are presented. An all-solid state laser system at 313 nm has been set up to provide cold Be(+) ions for sympathetic cooling of highly charged ions.
authors.affiliation: Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany. m.schwarz@mpi-hd.mpg.de
authors.forename: M
authors.initials: M
authors.lastname: Schwarz
authors.forename: O O
authors.initials: OO
authors.lastname: Versolato
authors.forename: A
authors.initials: A
authors.lastname: Windberger
authors.forename: F R
authors.initials: FR
authors.lastname: Brunner
authors.forename: T
authors.initials: T
authors.lastname: Ballance
authors.forename: S N
authors.initials: SN
authors.lastname: Eberle
authors.forename: J
authors.initials: J
authors.lastname: Ullrich
authors.forename: P O
authors.initials: PO
authors.lastname: Schmidt
authors.forename: A K
authors.initials: AK
authors.lastname: Hansen
authors.forename: A D
authors.initials: AD
authors.lastname: Gingell
authors.forename: M
authors.initials: M
authors.lastname: Drewsen
authors.forename: J R Crespo
authors.initials: JR
authors.lastname: López-Urrutia