Hannover 2010 – wissenschaftliches Programm
MS 3.7: Vortrag
Dienstag, 9. März 2010, 15:45–16:00, F 428
Implementation of a MR-ToF isobar separator at the on-line mass spectrometer ISOLTRAP — •Robert Wolf1, Klaus Blaum2, Christopher Borgmann2, Martin Breitenfeldt1, Daniel Fink2, Alexander Herlert3, Magdalena Kowalska3, Susanne Kreim2, Dave Lunney4, Gerrit Marx1, Sarah Naimi4, Marco Rosenbusch1, and Lutz Schweikhard1 — 1University Greifswald — 2Mpi for Nuclear Physics, Heidelberg — 3Cern, Geneva, Switzerland — 4Csnsm, Orsay, France
A multi-reflection time-of-flight mass separator (MR-ToF-MS) was installed at the ISOLTRAP/CERN mass spectrometer for isobaric purification of rare isotope ensembles as a preparation for precision mass determinations. The MR-ToF-MS consists of two ion optical 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. Previous 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+. In combination with a Bradbury-Nielsen beamgate, the MR-ToF-MS will support the existing purification methods of the setup to gain access to nuclides produced with high isobaric contamination yields at the ISOLDE facility. The modified ISOLTRAP setup and its performance will be presented.