Freiburg 2024 – scientific programme
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A: Fachverband Atomphysik
A 33: Poster VI
A 33.20: Poster
Thursday, March 14, 2024, 17:00–19:00, Tent A
Off-resonant measurements of trapped ions using a dual hot-end resonator — •Stefan Ringleb1, Markus Kiffer1, Manuel Vogel2, and Thomas Stöhlker1,2,3 — 1Friedrich Schiller-Universität Jena, 07743 Jena, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany — 3Helmholtz-Institut Jena, 07743 Jena, Germany
Ion detection in Penning traps is typically done using resonant circuits which consist of a wound coil connected to one electrode. The oscillating ions induce a current via mirror charges which drives the resonator resulting in a voltage for ion detection. Using such configurations in combination with superconducting coils, also single ions can be detected. This technique also allows for fast resistive ion cooling to reduce the centre-of-momentum energy of an ion or an ion ensemble with a correlated ion motion.
In our setup, we have investigated another approach - a normal-conducting resonator connected to two opposing electrodes. In this configuration, we are able to detect ion ensembles with a considerably high centre-of-momentum motion both in resonance and off resonance. This allows for ion detection without concurrent ion cooling opening new possibilies to characterise the ion bunch properties - in particular the transfer of ion energy from the centre-of-mass motion to the uncorrelated axial motion.
We will present our experimental setup and will give insight into the methods we can apply to determine the dephasing behaviour of the ion bunch.
Keywords: Penning trap; non-destructice ion detection; Resonator