Berlin 2014 – scientific programme

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MS: Fachverband Massenspektrometrie

MS 1: New Mass Spectrometric Methods and Technical Developments

MS 1.4: Talk

Monday, March 17, 2014, 11:30–11:45, DO24 1.205

Ion Sources for systematic Gas Cell studies — •Ann-Kathrin Rink¹, Samuel Ayet², Timo Dickel^1,2, Jens Eber¹, Hans Geissel^1,2, Florian Greiner¹, Emma Haettner², Ivan Miskun³, Wolfgang R. Plaß^1,2, Sivaji Purushothaman², Moritz Pascal Reiter¹, and Christoph Scheidenberger^1,2 — ¹Justus-Liebig Universität Gießen — ²GSI Helmholtzzentrum für Schwerionenforschung — ³Tomsk Polytechnic University

The FRS Ion Catcher, a test facility for the low energy branch (LEB)of the Super-FRS, has been commissioned and successfully tested. The current setup consists of a gas filled cryogenic stopping cell (CSC) to thermalise exotic nuclei, a diagnostic unit to monitor and transport the stopped and extracted ion beam into the multiple-reflection time-of-flight mass-spectrometer (MR-TOF-MS), where they are identified by precision mass measurements. The MR-TOF-MS can also be used to provide isobarically clean beams for experiments further downstream.

To investigate ion transport and extraction processes of the CSC three different ion sources are in use inside the CSC. A movable radioactiv ion source is mounted to test the ion transport depending on the initial ion position. A multiple target laser ablation ion source is mounted to test the mass and time dependency of the ion transport and extraction. It also provides calibration ions for the MR-TOF-MS. For investigating intensity limitations due to space charge and plasma effects and the cleanliness of the CSC an electrical discharge ion source is installed.