title: Evaporative cooling and coherent axial oscillations of highly charged ions in a penning trap.
abstract: Externally, in an electron beam ion trap, generated Ar16+ ions were retrapped in a Penning trap and evaporatively cooled in their axial motion. The cooling was observed by a novel extraction technique based on the excitation of a coherent axial oscillation which yields short ion bunches of well-defined energies. The initial temperature of the ion cloud was decreased by a factor of more than 140 within 1 s, while the phase-space density of the coldest extracted ion pulses was increased by a factor of up to about 9.
authors.affiliation: Atomic Physics, Fysikum, Stockholm University, AlbaNova Research Center, 10691 Stockholm, Sweden.
authors.forename: M
authors.initials: M
authors.lastname: Hobein
authors.forename: A
authors.initials: A
authors.lastname: Solders
authors.forename: M
authors.initials: M
authors.lastname: Suhonen
authors.forename: Y
authors.initials: Y
authors.lastname: Liu
authors.forename: R
authors.initials: R
authors.lastname: Schuch