Bonn 2010 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 53: Instrumentierung X

HK 53.3: Vortrag

Donnerstag, 18. März 2010, 17:15–17:30, HG IV

An MR-TOF-MS Isobar Separator and its Applications for TITAN at TRIUMF and the LEB at FAIR — •Christian Jesch1, Timo Dickel1, Wolfgang Plaß1,2, Arno Becker1, Ulrich Czok1, Hans Geissel1,2, Emma Haettner1,2, Wadim Kinsel1, Martin Petrick1, Christoph Scheidenberger1,2, and Mikhail I. Yavor31Justus-Liebig-Universität Gießen — 2GSI, Darmstadt — 3Inst. for Analytical Instrum., Russian Academy of Sci., St. Petersburg

At low-energy radioactive ion beam facilities, isobaric contamination and short lifetimes constitute strong limitations for mass measurements and spectroscopy of exotic nuclei. A non-scanning, multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS) with high transmission efficiency has been developed and built that will help to overcome these limitations.

A mass resolving power of > 300,000 FWHM, mass accuracies below 1 ppm and repetition rates of up to 100 Hz have been demonstrated. In order to use the MR-TOF-MS as an isobar separator, the ions have to be retrapped, accumulated and transferred to the connected experiments. The retrapping system is currently being designed and built.

First envisaged applications of the MR-TOF-MS are at TRIUMF’s Ion Trap for Atomic and Nuclear science (TITAN) and the low-energy branch of the Super-FRS at FAIR, facilitating measurements of beams with strong isobaric background as well as mass measurements on very short-lived nuclei (T1/2 ≥ 1 ms). Systematic studies on the instrument performance and goals for physics experiments will be presented.

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