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A: Fachverband Atomphysik

A 13: Highly Charged Ions and their Applications II

A 13.5: Vortrag

Dienstag, 3. März 2026, 12:15–12:30, N 25

Particle Motion Inside the HITRAP Penning Trap — •Jonas Ködel for the HITRAP collaboration — Institut für Kernphysik, TU Darmstadt, Schloßgartenstr. 9, Darmstadt, Germany — Helmholtz Graduate School for Hadron and Ion Research, Germany

The HITRAP (highly charged ion trap) facility located at the GSI Helmholtzzentrum für Schwer-ionenforschung in Darmstadt provides the unique ability to decelerate heavy, accelerator-produced highly charged ions (HCI) down to 6keV/nucleon and cool to eV equivalent temperature. To facilitate electron cooling of a single charge state inside HITRAP’s Penning trap, the motion of HCI inside a cylindrical Penning trap is explored.

We present our findings on the modes of motion of highly charged Argon ions inside the HITRAP Penning trap. By leveraging intentional over-excitation of stored ions by radio frequency, the characteristic frequencies of axial-, magnetron- and reduced cyclotron motion are extracted. With the full length of the cylindrical trap used for ion capture, the electrode potential is flat, rather than hyperbolic, hence the typical eigenmotion frequencies are mixed. Lastly, the effects of changes in the Penning trap’s magnetic field, the ion’s charge state, and the Penning trap’s potential on the three characteristic frequencies are shown.

Keywords: Penning Trap; Cyclotron Motion; Magnetron Motion; HCI; Deceleration