Hamburg 2009 – scientific programme

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MS: Fachverband Massenspektrometrie

MS 7: Poster

MS 7.8: Poster

Tuesday, March 3, 2009, 16:00–18:00, VMP 9 Poster

An electrostatic mass separator for ISOLTRAP — •Robert Wolf¹, M. Breitenfeldt¹, Alexander Herlert², Gerrit Marx¹, and Lutz Schweikhard¹ — ¹Inst. f. Physik, Ernst-Moritz-Arndt-Universität, D-17489 Greifswald — ²Physics Department, CERN, 1211 Geneva 23, Switzerland

An electrostatic ion beam trap was built as a test device for future separation and removal of isobaric ions at ISOLTRAP. Electrostatic ion beam traps consist of two ion mirrors between which ions are oscillating and are separated by their mass-over-charge ratio m/q. Flight paths of several hundreds of meters are folded to an apparatus length of less than one meter. It is planned to install the device at the ISOLTRAP experiment at CERN/Geneva to support the contamination removal of isobaric masses caused by the production of short-lived nuclides at the ISOLDE facility. First tests resulted in a mass resolving power of up to m/Δ m ≈ 10⁵ and the separation was demonstrated for the isobaric ions CO and N₂. Further improvements concerning trapping techniques will be presented, in particular with respect to the injection and ejection of ions without switching the mirror potentials.