SAMOP 2023 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 7: Poster
MS 7.1: Poster
Donnerstag, 9. März 2023, 16:30–19:00, Empore Lichthof
Doppler- and sympathetic cooling for the investigation of short-lived radionuclides — •Franziska Maria Maier1,2 and Simon Sels1 — 1ISOLDE/CERN — 2Universität Greifswald
For the MIRACLS collaboration.
Ever since its introduction in the mid 1970s, laser cooling has become a fundamental technique to prepare and control ions and atoms for a wide range of precision experiments. Nevertheless, because of its simplicity and element-universality, buffer-gas cooling in a linear, room-temperature Paul trap is more commonly used at contemporary radioactive ion beam (RIB) facilities. Recent advances in experimental RIB techniques, especially in laser spectroscopy and mass spectrometry, would however strongly benefit from ion beams at much lower beam temperature as in principle attainable by laser cooling.
Within the MIRACLS low-energy apparatus, we demonstrate that laser cooling is compatible with the timescale imposed by short-lived radionuclides as well as with existing instrumentation at RIB facilities[1]. Despite an initial kinetic energy of the externally-produced hot ions of several eV at the trap's entrance, temporal widths of the extracted ion bunches corresponding to an ion-beam temperature of around 6 K are obtained within a cooling time of 200 ms.
I will present the experimental results of our laser cooling studies, including the improvement of mass resolving power of an MR-ToF device (electrostatic ion beam trap), and give an outlook to future opportunities for high-precision measurements at RIB facilities.
[1] S. Sels, F.M.Maier et al, Phys.Rev.Res. 4, 033229 (2022).