Dresden 2011 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 3: Poster

MS 3.16: Poster

Montag, 14. März 2011, 16:00–18:00, P1

Implementation of temperature and pressure stabilization systems at MLLTRAP* — Kevin Krug, Dietrich Habs, Jerzy Szerypo, Peter Thirolf, and •Christine Weber — Fakultät für Physik, Ludwig-Maximilians Universität München

MLLTRAP at the Maier-Leibnitz Tandem Accelerator Laboratory in Garching is a Penning trap setup, built to perform high-accuracy mass measurements on fusion-reaction products. During its commissioning phase, MLLTRAP is operated with an offline surface ionization source and characterization measurements are carried out to assess the inherent systematic uncertainties of the setup. For example, the magnetic-field-dependent variations of measured cyclotron frequencies show strong correlations to daily variations of ambient temperatures and pressures, which eventually limit the achievable precision in mass measurements. For this purpose, dedicated stabilization systems for the temperature of the trap environment and the helium exhaust of the magnet’s cryostat were implemented. These stabilization systems result in a reduction of present fluctuations by about two orders of magnitude to about ±6 mK and ±0.2 hPa for the temperature and pressure, respectively. This contribution will describe the current status of the experiment.

[*]Supported by the DFG under contract HA 1101/14-1 and by the Maier-Leibnitz-Laboratory, Garching.