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HK: Fachverband Physik der Hadronen und Kerne

HK 49: Poster

HK 49.37: Poster

Donnerstag, 15. März 2007, 16:00–17:00, P

Status of MLLTRAP — •Veli Sakari Kolhinen, Dietrich Habs, Jürgen Neumayr, Ulrich Schramm, Michael Sewtz, Jerzy Szerypo, and Peter Thirolf — Ludwig-Maximilians-Universität München and Maier-Leibnitz Laboratory, D-85748 Garching

The Penning-trap system MLLTRAP is designed to investigate medium-mass and heavy neutron-rich isotopes from fission, fusion and fission-fusion reactions. Foreseen as main experiments are high-precision mass measurements, as well as in-trap e- or α-spectroscopy. The set-up is presently in its construction and commissioning phase at the MLL in Garching. During on-line measurements at the Tandem accelerator reaction products will be thermalised by the MLL-IonCatcher and transfered to the traps via an RFQ cooler buncher. The MLL-Ioncatcher consists of a buffer-gas stopping cell and an RFQ-based extraction system. During on-line test using α-emitting reaction products the MLL-IonCatchers showed an overall efficiency of 10-16%. In the future it is planned to use highly charged ions, charge-bred in an EBIS, in order to obtain higher cyclotron frequencies in the Penning trap, thus improving the mass accuracy up to δ m /m ≤ 10⁻⁸. Since buffer-gas cooling is not applicable for highly charged ions the sympathetic cooling technique with Mg⁺ ions will be applied before the injection into the traps. The present status of the MLLTRAP will be presented in this poster.

This work was supported by EU(NIPNET) under contract HPRI-CT-2001-50034, by GSI F&E under contract LM/HA2 and EU (IONCATCHER) under contract HPRI-CT-2001-50022