Berlin 2014 – scientific programme
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MS: Fachverband Massenspektrometrie
MS 6: Poster
MS 6.12: Poster
Wednesday, March 19, 2014, 14:00–14:00, DO24 Foyer
Status and Perspective of a New Time-Of-Flight Detector for the Isochronous Mass Spectrometry in the Collector Ring at FAIR — •Marcel Diwisch1, Natalia Kuzminchuk-Feuerstein1,2, Hans Geissel1,2, Ronja Knöbel1,2, Timo Dickel1,2, Wolfgang Plaß1,2, Christoph Scheidenberger1,2, and Helmut Weick2 — 1Justus-Liebig-University Gießen — 2GSI, Darmstadt
The masses of exotic nuclei can be measured directly in ion storage rings by measuring their revolution time in the ring. In the presently used FRS-ESR facility one method to do this is the so called Isochronous Mass Spectrometry (IMS). With the IMS method mass values of exotic nuclei with lifetimes as short as a few 10µs are accessible. To determine the masses the revolution time of the ions in the ring is measured by a Time-Of-Flight (TOF) detector.
The future Collector Ring (CR) will be different compared to the current ESR not only in circumference but also in terms of beam dimensions and intensities. In order to use an advanced version of the IMS in the CR a new double detector system, which improves the mass resolution of the IMS method and fulfills the requirements of the new beam dimensions will be shown.
Improvements of almost a factor 2 for the timing accuracy with at least 95% detection efficiency is expected compared to the current design, even though the detector dimensions had to be increased by a factor of 2 to adapt to the new beam dimensions.