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MS: Massenspektrometrie

MS 5: Präzisions-MS kurzlebiger Nuklide 1

MS 5.7: Vortrag

Mittwoch, 15. März 2006, 15:45–16:00, H1

Technical developments for a non-destructive ion detection — •Rafael Ferrer1, Klaus Blaum1,2, Michael Block2, Jens Ketelär1, H.-Jürgen Kluge2, Stefan Stahl3, Christine Weber1,2, and the SHIPTRAP Collaboration21Institute of Physics, Johannes Gutenberg-University, D-55099 Mainz — 2GSI, D-64291 Darmstadt — 3Stahl-Electronics, D-67582 Mettenheim

Accurate Penning trap mass spectrometry on radionuclides was up to now only achieved with the destructive time-of-flight ion-cyclotron-resonance (ICR) method. This detection scheme is not applicable for exotic, transuranium nuclides with extremely low production rates, as investigated with the SHIPTRAP setup behind SHIP at GSI. A sensitive and non-destructive method, like the narrow-band Fourier Transform-ICR technique, is then ideally suited for the identification and characterization of these species. Therefore a cryogenic Penning trap setup has been built. It consists of a cylindrical trap for isobaric cleaning under presence of a helium buffer gas at a pressure of 10−4 mbar and a hyperbolical trap for the mass determination. In the SHIPTRAP setup both traps are placed 20 cm apart from each other. In order to guarantee the required vacuum conditions of better than 10−9 mbar for a coherent ion motion while transient recording, they have to be separated by a pumping barrier. An overview of the current status of the setup, as well as the results of differential pumping tests at temperatures of 300 K and 80 K will be presented.

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DPG-Physik > DPG-Verhandlungen > 2006 > Frankfurt