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MS: Massenspektrometrie

MS 6: Präzisions-MS kurzlebiger Nuklide 2

MS 6.3: Talk

Thursday, March 16, 2006, 11:25–11:40, H1

Systematic investigations at SHIPTRAP — •Ana Martin and SHIPTRAP collaboration — Planck 1, 64291 Darmstadt

Systematic investigations at SHIPTRAP - A. Martín for the SHIPTRAP collaboration GSI, Planckstrasse 1, D-64291 Darmstadt, Germany The ion-trap experiment SHIPTRAP at GSI Darmstadt was set up and commissioned to perform various precision experiments on heavy elements produced in fusion-evaporation reactions at SHIP. In the first stage SHIPTRAP focuses on high-precision mass measurements of exotic heavy nuclei with a Penning trap spectrometer. The results provide information for nuclear structure studies or to test astrophysical theories. Systematic investigations have been performed to determine the uncertainties of a mass measurement due to magnetic field fluctuations. These fluctuations were determined to be around 10E-9 per hour. The studies carried out at SHIPTRAP indicate that the magnetic field fluctuations are mainly given by the temperature variation, so a temperature stabilization system is being planned. In addition, magnetic field fluctuations due to changes of the helium pressure in the dewar of the superconducting coil are expected. To avoid problems with this remaining factor, a stabilization system for the pressure of the superconducting magnet is being developed too. Similar systems are already successfully used at SMILETRAP [1] and ISOLTRAP.

[1] ’ SMILETRAP - A Penning trap facility for precision mas measurements using higly charged ions ’, I. Bergström, C. Calberg, T. Fritioff, G. Douysset, J. Schönfelder and R. Schuch NIM A487, 618-651 (2002)