Speaker
Description
The Resonance Ionization Laser Ion Source (RILIS) continues to provide element-selective radioactive ion beams to users at the ISOLDE facility[1], serving as the laser ion source for over 50% of experiments in 2025. In addition to its high efficiency in producing pure radioactive ion beams, RILIS has been advancing its capabilities through the Laser Ion Source and Trap (LIST) technique, employing perpendicular laser-atom interaction to enhance spectral resolution beyond Doppler broadening, achieving linewidths on the order of a few hundred MHz[2]. RILIS has also improved its laser systems to expand spectral coverage and enhance high-resolution performance.
In this talk, we will present RILIS operational activities for 2025, including recent progress in laser upgrades and the characterization and optimization of the LIST ion source, enabling continuous, stable operation with broader spectral coverage and improved high-resolution spectroscopy. A new dedicated data recorder for RILIS was successfully used for online operation and will also be discussed. Growing demand for the LIST ion source has prompted further upgrades, with several ISOLDE proposals requesting its use. In terms of research output, RILIS with LIST has been exploring its spectroscopic capabilities on exotic isotopic species affected by isobaric contamination. Two recent measurements on Pm isotopes (N=71–92) and Ni isotopes (N=41–46) will be presented[3,4]. Finally, we will discuss planned RILIS upgrades, including developments for LS3 and the Knowledge-Transfer funded project for automation of the MEDICIS laser laboratory.
References
[1] V. Fedosseev et al., J. Phys. G: Nucl. Part. Phys. 44 084006 (2017)
[2] R. Heinke et al., Hyperfine Interact 238, 6 (2017)
[3] K. Chrysalidis et al., CERN-INTC-2024-070, INTC-P-722 (2024)
[4] J. Reilly et al., CERN-INTC-2024-067, INTC-P-719 (2024)