Oct 3 – 7, 2022
Science Culture Center, IBS
Asia/Seoul timezone

First in-gas laser spectroscopy with S3-LEB

Oct 3, 2022, 8:46 PM
S236 (Science Culture Center, IBS)


Science Culture Center, IBS

55 EXPO-ro, Yuseong-gu, Daejeon
Poster Session Poster Session


Anjali Ajayakumar (GANIL/CNRS)


The S$^3$-LEB (Super Separator Spectrometer-Low Energy Branch) is a low energy radioactive ion beam installation dedicated to the study of exotic nuclei, which is currently under commissioning as a part of the GANIL-SPIRAL2 facility [1]. High intensity primary beams delivered by the superconducting LINAC of SPIRAL 2 will allow increased production rates of nuclei by fusion evaporation reactions and thus will facilitate the exploration of the neutron-deficient and heavy-mass extremes of the nuclear chart. The reaction products will be separated by the recoil separator S$^3$ and will be delivered to the LEB installation coupled to the S$^3$ focal plane [2].

S$^3$-LEB is a gas cell setup where the radioactive ions of interest are thermalized, neutralized and then selectively laser ionized either inside the gas cell or in a hypersonic gas jet environment created after the gas cell using a De-Laval nozzle. It is then followed by radiofrequency quadrupole ion guides, which allow efficient transmission of the ions to a Multi-Reflection Time of Flight Mass Spectrometer (MR-TOF MS) for further beam purification and detection. A decay spectroscopy station, Spectroscopy Electron Alpha in Silicon Box Counter (SEASON), will also be coupled to the LEB installation expanding its capabilities. First offline results from S$^3$-LEB were published recently presenting the commissioning of laser systems and conditions for optimum operation of the ion guides obtained using an alkali ion source [3].

Here we present the progress in the offline commissioning of the S$^3$-LEB setup highlighting the results obtained after coupling the gas cell to the ion guides and the first laser spectroscopy in the gas cell/jet, as well as the transport of laser ions, bunching and trapping in the MR-TOF MS. For the offline tests and in preparation of one of the day-1 experimental campaigns, a filament was heated in the gas cell for the production of stable isotopes of Erbium. A first view of the performance of the installation in preparation for S$^3$ experiments will be given.

[1] Grand Accélérateur National d'Ions Lourds, URL: https://www.ganil-spiral2.eu/en/
[2] F. Déchery et al., Eur. Phys. J. A 51, 66 (2015), URL: https://doi.org/10.1140/epja/i2015-15066-3
[3] J.Romans et al., Atoms, 10, 21 (2022), URL : https://doi.org/10.3390/atoms10010021

Primary author

Anjali Ajayakumar (GANIL/CNRS)


Mr Yazeed Balasmeh (University of Caen) Lucia Caceres (GANIL/CNRS) Mr Arno Claessens (KU LEUVEN) Ms Wenling Dong (IJC lab) Mr Rafael Ferrer (KU LEUVEN) Mr Xavier Flechard (LPC ) Mr Serge Franchoo (IJC lab) Ms Sarina Geldhof (GANIL/CNRS) Mrs Nathalie Lecesne (GANIL/CNRS) Mr Renan Leroy (GANIL) Mr Vladimir Manea (IJC lab) Mr Iain Moore (JYU FINLAND) Mr Alejandro Ortiz-Cortes (GANIL) Mr Delahaye Pierre (GANIL/CNRS) Mr Jekabs Romans (KU LEUVEN) Mr Herve Savajols (GANIL) Mr Simon Sels (KU LEUVEN) Mr Piet Van Duppen (KU LEUVEN) Dr Klaus Wendt (JGU MAINZ) Mr Antoine de Roubin (KU LEUVEN) Mr Ruben de Groote (KU LEUVEN)

Presentation materials