Mainz 2026 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 15: Poster – Highly Charged Ions and their Applications
A 15.9: Poster
Dienstag, 3. März 2026, 17:00–19:00, Philo 1. OG
Development of a rare-isotope injector for optical spectroscopy of highly charged ions at HD-EBIT — •Nutan Kumari Sah2, Lakshmi Priya Kozhiparambil Sajith2, Filipe Grillo2, Joschka Goes1, Thomas Pfeifer1, Steven Worm2, Hendrik Bekker3, and José R. Crespo López-Urrutia1 — 1Max-Planck-Institut für Kernphysik, D-69117 Heidelberg, Germany — 2DESY, D-15738 Zeuthen, Germany — 3Helmholtz Institute Mainz, 55099 Mainz, Germany
Highly charged ions (HCI) are promising candidates for advanced frequency metrology and precision tests of fundamental physics. Transitions between their strongly bound electronic states are insensitive to external perturbations. Interestingly, the presence of a 5f − 6p orbital crossing in several charge states of californium enables strongly forbidden optical transitions with exceptionally high sensitivity to a hypothetical variation of the fine-structure constant. However, due to theoretical uncertainties emission spectroscopy is needed to accurately determine their wavelengths for future frequency metrology. We are implementing at the superconducting Heidelberg electron beam ion trap a laser-ablation-based injection system requiring only nanogram amounts of californium and other rare elements. We will present an update and outline the next steps towards spectroscopy of californium HCI.
Keywords: Highly charged ions; Californium; Optical clocks; Fundamental physics; Spectroscopy