Berlin 2005 – scientific programme

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MS: Massenspektrometrie

MS 9: Pr
äzisions-MS kurzlebiger Nuklide 2

MS 9.3: Talk

Monday, March 7, 2005, 16:45–17:00, HU Senatssaal

Magnetic field stabilization in superconducting magnets for high-precision Penning trap experiments — •Slobodan Djekic¹, Klaus Blaum^1,2, Maxime Brodeur³, Pierre Delahaye⁴, Jens Dilling³, Sebastian George¹, Frank Herfurth², Alex Herlert^4,5, Hans-Jürgen Kluge², Wolfgang Quint², Lutz Schweikhard⁵, Stefan Stahl¹, José Verdu¹, Manuel Vogel¹, Günther Werth¹, and Chabouh Yazidjian^2,4 — ¹Insitut für Physik, Universität Mainz, 55099 Mainz — ²GSI, 64291 Darmstadt — ³TRIUMF, Vancouver, British Columbia V6T 2A3, Canada — ⁴Department of Physics, CERN, 1211 Geneve 23, Switzerland — ⁵Insitut für Physik, Ernst-Moritz-Arndt-Universität, 17487 Greifswald

Many high-precision experiments with Penning traps are presently limited by magnetic field fluctuations in the superconducting magnet. The magnetic field instabilities originate from external and/or internal sources, e.g. temperature and pressure fluctuations in the helium and nitrogen reservoirs of the superconducting magnets. They cause changes in the properties of the materials surrounding the Penning trap and thus in the magnetic field strength and homogeneity. The effect of temperature and pressure fluctuations was evaluated and a stabilization system for both was implemented resulting in a reduction of the systematic uncertainties. The technical realization and experimental results from the Penning trap mass spectrometer ISOLTRAP at ISOLDE/CERN and the g-factor Penning trap at the University of Mainz will be presented.