Stuttgart 2012 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 6: Poster
MS 6.16: Poster
Dienstag, 13. März 2012, 16:30–19:00, Poster.IV
Ion Beam Camera for Mass Spektrometers — •Ann-Kathrin Rink1, Jens Ebert1, Timo Dickel1,2, Hans Geissel1,2, Martin Petrick1, Wolfgang Plaß1,2, and Christoph Scheidenberger1,2 — 1Justus-Liebig-Universität, Giessen — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt
For the design and performance optimisation of a mass spectrometer the spatial distribution of the ion beam plays an important role. In particular, for a multiple-reflection time-of-flight mass spectrometer it is important to know how the spatial distribution of ions evolves with increasing number of turns. The ion beam camera has been developed, which allows to determine the ion distribution.
For detecting the ions two micro-channel-plates (MCP) in chevron configuration are used to generate conversion electrons and amplify the signal. The electrons are post-accelerated onto a phosphor screen. The fluorescence light is recorded by a CCD camera mounted in vacuum. The advantage of such a detector system is the fast method of position distribution determination, the simplicity of the required setup and electronics and the single ion sensitivity. Furthermore the MCP detectors can be tested for their spatial homogeneity.
The instrument was designed, constructed and successfully tested. The setup and results will be shown and discussed.