Heidelberg 2015 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MS: Fachverband Massenspektrometrie
MS 3: New Mass Spectrometric Methods and Technical Developments
MS 3.2: Vortrag
Montag, 23. März 2015, 17:15–17:30, PH/HS2
Multi-purpose RFQ Beamline for ion cooling, transport, identification, separation, beam mixing and bunching at the FRS Ion Catcher — •Ann-Kathrin Rink for the FRS Ion Catcher collaboration — Justus-Liebig Universität Gießen
Conventional low-energy beam lines use a structures of electrostatic or magnetic fields for transporting and guiding ions. However, those beam lines require low vacuum pressures for efficient transport; in the vicinity of buffer gas stopping cells low vacuum pressures cannot be provided. At pressures of about 10−2 mbar radio-frequency quadruples (RFQ) can provide an efficient, reliable ion transport. Such a transport system based on RFQs also enables identification, mass separation (RFQ operated as mass filter), cooling, bunching and beam mixing (merging ions of interest with calibration ions) in a compact setup. It is coupled easily to identification detectors using alpha or beta spectroscopy and accurate mass spectrometers. For these reasons the low-energy beam line of the FRS Ion Catcher is designed as RFQ beam line.
A novel component in the RFQ beam line of the FRS Ion Catcher is an RFQ switch yard that allows to guide or split a beam into five directions, as well as to merge five beams. The RFQ beam line was commissioned offline and online and was essential for performing efficient experiments at the FRS Ion Catcher.