Düsseldorf 2007 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
MS: Fachverband Massenspektrometrie
MS 6: Präzisionsmassenspektrometrie und Ionenfallen
MS 6.3: Talk
Wednesday, March 21, 2007, 14:45–15:00, 5F
Newly developed image current detection system for high-accuracy mass measurements in a Penning trap — •Jens Ketelaer1, Klaus Blaum1,2, Sebastian George1, Rafael Ferrer1, Szilard Nagy1, Dennis Neidherr1, Stefan Stahl1, Christine Weber1, and collaboration SHIPTRAP2 — 1Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany — 2GSI Darmstadt, 64291 Darmstadt, Germany
Penning trap mass spectrometry is based on the determination of the mass related cyclotron frequency of charged particles confined in a quadrupolar electric field and a homogeneous magnetic field [1]. Ideally suited for nuclides with very low production rates but rather long half-lives is the narrow-band Fourier Transform-Ion Cyclotron Resonance (FT-ICR) detection technique. A tuned LC circuit with a high quality factor Q serves as a detector for ion-induced image currents. A new double-Penning trap mass spectrometer using this method has been recently developed and constructed for SHIPTRAP [2]. The setup is currently tested at the University of Mainz to demonstrate the required single-ion sensitivity. It consists of a cryogenic helical coil at 4.2 K with an unloaded Q-value of about 15000 and a chain of amplifiers to ensure a suitable signal-to-noise ratio. The characteristics determined so far allow for the detection of the reduced cyclotron frequency of a single ion. Some test results and the current status of the project will be presented.
[1] K. Blaum, Phys. Rep. 425, 1 (2006).
[2] C. Weber et al., Eur. Phys. J. A 25, S01, 65 (2005).