<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Sympathetic Cooling of Ions in a Hybrid Atom Ion Trap"^^ . "In this thesis the dynamics of a trapped ion immersed in\r\na spatially localized buffer gas is investigated. For a homogeneous buffer gas, the ion’s energy distribution reaches a stable equilibrium only if the mass of the buffer gas atoms is below a critical value. This limitation can be overcome by using multipole traps in combination and/or a spatially confined buffer gas. Using a generalized model\r\nfor elastic collisions of the ion with the buffer gas atoms, the ion’s energy distribution is numerically determined for arbitrary buffer gas distributions and trap parameters. Three regimes characterized by the respective analytic form of the ion’s equilibrium energy distribution\r\nare found. One of these is a novel regime at large atom-to-ion mass ratios where the final ion temperature can tuned by adiabatically decreasing the spatial extension of the buffer gas and the effective ion trap depth (forced sympathetic cooling). The second part of the thesis presents a hybrid atom ion trap designed for sympathetic cooling of hydroxide anions. In this hybrid trap the anions are immersed in a cloud of laser cooled rubidium atoms. The translational and rovibrational temperatures of the anions is probed by photodetachment tomography and spectroscopy which shows the first ever indication of sympathetic cooling of anions by laser cooled atoms."^^ . "2016" . . . . . . . "Bastian"^^ . "Höltkemeier"^^ . "Bastian Höltkemeier"^^ . . . . . . "Sympathetic Cooling of Ions in a Hybrid Atom Ion Trap (PDF)"^^ . . . "2016_Hoeltkemeier_Dissertation_Final.pdf"^^ . . . "Sympathetic Cooling of Ions in a Hybrid Atom Ion Trap (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "Sympathetic Cooling of Ions in a Hybrid Atom Ion Trap (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Sympathetic Cooling of Ions in a Hybrid Atom Ion Trap (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Sympathetic Cooling of Ions in a Hybrid Atom Ion Trap (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Sympathetic Cooling of Ions in a Hybrid Atom Ion Trap (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #22096 \n\nSympathetic Cooling of Ions in a Hybrid Atom Ion Trap\n\n" . "text/html" . . . "500 Naturwissenschaften und Mathematik"@de . "500 Natural sciences and mathematics"@en . . . "530 Physik"@de . "530 Physics"@en . .