Speaker
Description
The DESIREE double cryogenic storage ring at Stockholm University uniquely combines the ability to store and manipulate ions for extended periods of time with the merged-beams configuration allowing studies of sub-eV collisions between ions of opposite charges. By storage alone, molecules are allowed to relax vibrationally and rotationally towards their thermal equilibrium with the cryogenic surroundings, while in particular for small molecular and for atomic ions, the long storage time can be exploited to perform laser-manipulation. In this contribution we present four examples of experiments making use of this unique capability of DESIREE's.
Collision with oppositely charged fullerenes C$_{60}^+$ + C$_{60}^-$ [1], dissociate mutual neutralization in NO$^+$ + O$^-$ collisions [2], MN for metastable and ground state Si$^-$ with Na$^+$ and K$^+$ [3] and MN for Au$^-$ ions with Ba$^+$ with the initial state selected by optical pumping [4].
References
[1] M Gatchell et al. Astronomy & Astrophysics 693, A43 (2025).
[2] M Poline et al. Phys Rev Letters 132, 023001 (2024).
[3] R Poulose et al. To be submitted.
[4] R Poulose et al. To be submitted.
