Frankfurt 2006 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
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 Collaboration2 — 1Institute 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.