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A: Fachverband Atomphysik

A 15: Poster – Highly Charged Ions and their Applications

A 15.8: Poster

Dienstag, 3. März 2026, 17:00–19:00, Philo 1. OG

Highly charged ion beamline for efficient ion transmission with charge state selection — •Shreya Rao Kodancha, Sebastian Davidson, Elwin A. Dijck, Ruben B. Henninger, Devanarayanan Rajeeb Kumar, Vera M. Schäfer, Thomas Pfeifer, and José R. Crespo López-Urrutia — Max Planck Institute for Nuclear Physics

Highly charged ions (HCIs) are promising candidates for searches for physics beyond the Standard Model, such as King plot isotope shift studies. In the VAUQSI apparatus under development, HCIs will be interrogated in a cryogenic superconducting RF Paul trap, where the anticipated low Lamb*Dicke factor should enable efficient ground-state cooling. HCIs produced in the electron beam ion trap (EBIT) must be transported to the trap through a low-energy beamline consisting of multiple electrostatic lenses for focusing, a 90° bender for steering, and a pulsed drift tube for deceleration and bunching. Charge-state and isotope selection along the beam path will also be explored. Optimizing ion transmission involves a large parameter space, including electrode voltages, EBIT extraction rate and switching times for charge-selection electrodes. Building on our experience with the CryPTEx-SC beamline, automated optimization tools will be employed. We report on the beamline design, accompanying simulations, current progress and the planned optimization for VAUQSI.

Keywords: Ion optics; Superconducting RF Paul trap