Speaker
Description
The Resonance Ionisation Laser Ion Source (RILIS) continues to be the ion source chosen most often to provide radioactive ion beams (RIBs) for experiments at CERN-ISOLDE, as ionisation through optical resonance offers high chemical selectivity and efficiency [1,2]. To suppress potentially contaminating surface ionisation whilst maintaining laser ionisation, Laser Ion Source and Trap (LIST) was introduced, addressing the contamination of other isobars within the RIBs [3,4]. The development of laser ionisation schemes and ion sources like LIST currently requires the use of either the RILIS setup at ISOLDE or the associated Offline laboratories at CERN. [5]
The constant demand for the ISOLDE-RILIS facility and the Offline laboratories as well as the current allocated space limits the available time and room for dedicated laser scheme development, laser ion source development, and new techniques for ion beam preparation. This highlights both the scientific and practical need for a dedicated development beamline. To support these development and characterisation studies, apart from the vast array of laser systems, this new beamline will be equipped with the necessary positively charged particle optics and a Time-of-Flight Mass Spectrometer (ToF-MS).
The offline LARIS (LAser Resonance Ionisation Spectroscopy) beamline will provide the space for laser scheme development, characterisation studies of laser-atom interactions and novel laser ion source and target units, and provide controlled test beams for new beam preparation techniques, while significantly reducing the load on the current facilities. This presentation will be focussed on the design and simulation towards construction of the new LARIS beamline. Current progress will be presented including COMSOL ion trajectory and beamline simulations.
References
[1] R. Catherall et al., J. Phys. G: Nucl. Part. Phys. 44, 094002 (2017)
[2] V. Fedosseev et al., J. Phys. G: Nucl. Part. Phys. 44, 084006 (2017)
[3] B. Marsh et al., Hyperfine Int. 196, 129 (2010)
[4] R. Heinke et al., Nucl. Inst. and Meth. B 541, 8 (2023)
[5] S. Rothe et al., Nucl. Inst. and Meth. B 542, 38 (2023)