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MS: Fachverband Massenspektrometrie

MS 3: Resonance Ionization MS, ICPMS and others II

MS 3.2: Vortrag

Montag, 12. März 2012, 17:00–17:15, V57.06

Performance of a high repetition rate pulsed laser system for in-jet laser ionization and spectroscopy studies in the Leuven laser ion source, LISOL — •Volker Sonnenschein¹, Rafael Ferrer², Mark Huyse², Tobias Kron³, Yuri Kudryavtsev², Nathalie Lecesne⁴, Iain Moore¹, Johannes Rossnagel³, Sebastian Raeder⁵, Herve Savajols⁴, Paul Van den Bergh², Piet Van Duppen², and Klaus Wendt³ — ¹University of Jyväskylä, Finland — ²Instituut voor Kern- en Stralingsfysika, Katholieke Universiteit Leuven — ³Institut für Physik, Universität Mainz — ⁴GANIL, Caen, France — ⁵TRIUMF, Vancouver, Canada

The laser ionization efficiency of the Leuven gas cell-based laser ion source at the LISOL facility was investigated under on- and off-line conditions using two distinctly different laser systems - a medium repetition rate dye laser system (200 Hz) as well a high repetition rate Ti:sapphire laser system (10 kHz). A systematic study of the ion signal dependence on repetition rate and laser pulse energy was performed in off-line tests on stable cobalt and copper isotopes. Off-line studies also included high resolution in-jet laser spectroscopy measurements of the hyperfine structure of ⁶³Cu and the investigation of laser ion pulse time profiles.
A final on-line run with the short-lived radioisotope ⁵⁹Cu showed a very comparable yield from the two laser systems for in-cell ionization, however, a considerable advantage of using the high-repetition rate system for in-jet laser ionization within the sextupole extraction structure could be demonstrated.