Abstract
The double electrostatic and cryogenic ion-beam storage ring, DESIREE, is a tool for studies of ions of atoms and molecules. It is unique in that it combines two important abilities, to store ions for very long times (up to hours) allowing the stored ions to relax to their lowest quantum states, and to study the interactions between oppositely charged ions stored in two separate storage rings with a common ion-beam merging section at low and well-controlled center-of-mass energies. We present results of experiments investigating the relaxation of molecular ions and of experiments studying the process of mutual neutralization between negative hydrogen ions and positive ions of different metals. A good understanding of the mutual-neutralization process is important for a correct modelling of stellar atmospheres and a correct quantitative determination of metal abundances from the strengths of the absorption features in stellar spectra.
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Acknowledgements
This single-author contribution is relying very strongly of immense amounts of hard work from all the colleagues involved in the construction, the operation and the use in experiments of DESIREE. I thank them all. This work was performed at the Swedish National Infrastructure, DESIREE (Swedish Research Council Contracts No. 2017-00621 and 2021-00155). The work is part of the project “Probing charge- and mass-transfer reactions on the atomic level”, supported by the Knut and Alice Wallenberg Foundation (2018.0028). The author acknowledges individual funding from the Swedish Research Council (contract No 2022-02822).
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Schmidt, H.T. (2023). DESIREE: A Laboratory Astrophysics Experiment with Cryogenically Cooled Electrostatic Ion Beam Storage Rings. In: Mennella, V., Joblin, C. (eds) European Conference on Laboratory Astrophysics ECLA2020. ECLA 2021. Astrophysics and Space Science Proceedings, vol 59. Springer, Cham. https://doi.org/10.1007/978-3-031-29003-9_20
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DOI: https://doi.org/10.1007/978-3-031-29003-9_20
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