Heidelberg 2015 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 2: Precision Mass Spectrometry 2

MS 2.3: Vortrag

Montag, 23. März 2015, 15:15–15:30, PH/HS2

The detection systems of the Penning-trap mass spectrometer PENTATRAP — •Rima Schüssler^1,2, Hendrik Bekker¹, Klaus Blaum¹, Christine Böhm^1,3, José Crespo López-Urrutia¹, Andreas Dörr¹, Sergey Eliseev¹, Mikhail Goncharov¹, Yuri N. Novikov⁴, Alexander Rischka¹, Sven Sturm¹, and Stefan Ulmer⁵ — ¹Max-Planck-Institut für Kernphysik, Heidelberg, Germany — ²Universität Heidelberg, Fakultät für Physik und Astronomie, Heidelberg, Germany — ³ExtreMe Matter Institute EMMI, Helmholtz Gemeinschaft, Darmstadt, Germany — ⁴Petersburg Nuclear Physics Institute, Gatchina, Russia — ⁵Ulmer Initiative Research Unit , RIKEN, Wako, Saitama, Japan

The Penning-trap mass spectrometer PENTATRAP is currently in the commissioning phase at the Max-Planck-Institut für Kernphysik in Heidelberg. Measurements of mass ratios of single stable and long lived highly charged ions with a relative uncertainty below 10⁻¹¹ are aimed for. The mass-ratio measurement is carried out by determining simultaneously the cyclotron frequencies of two ions in the magnetic fields of the Penning traps. For this purpose the ions’ eigenfrequencies are measured by means of a non-destructive detection of image currents induced in the trap electrodes by the oscillating ions. Essential part of each detection circuit is a cryogenic high-quality resonator, realised as a superconducting or copper coil in a copper housing. Together with cryogenic GaAs FET amplifiers, the small image currents (∼fA) induced by a single ion become detectable. The design of a new detection system as well as first tests will be presented in the talk.