Parts | Days | Selection | Search | Downloads | Help
MS: Fachverband Massenspektrometrie
MS 7: Massenspektrometrische Verfahren, neue Entwicklungen und Anwendungen
MS 7.3: Talk
Tuesday, March 11, 2008, 17:00–17:15, 3E
A Radio Frequency Mass Filter for SHIPTRAP — •Emma Haettner1,2, Timo Dickel1, Benjamin Fabian1,2, Hans Geissel1,2, Martin Petrick1, Wolfgang Plaß1, and Christoph Scheidenberger1,2 — 1Justus-Liebig-Universität, Gießen — 2GSI, Darmstadt
SHIPTRAP is an experiment at GSI for highly accurate mass measurements of fusion-evaporation products. Exotic nuclei produced in fusion reactions are separated from the primary beam in the velocity filter SHIP, stopped in a gas cell and bunched and transferred to a double Penning trap system.
Contaminant ions created in the gas-filled stopping cell can significantly reduce the performance of SHIPTRAP. In order to remove the contaminant ions from the nuclei of interest and thus increase selectivity and efficiency of the experiment, a radio-frequency quadrupole (RFQ) mass filter is being developed. In a matched combination with an RFQ cooler and an RFQ buncher, the mass filter will replace the existing SHIPTRAP buncher. Design parameters such as dimensions, voltages and vacuum conditions were chosen with help of simulations. Simulations and first measurements of the RFQ mass filter characteristics such as transmission and resolution will be presented.