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A: Fachverband Atomphysik
A 35: Poster VIII
A 35.2: Poster
Donnerstag, 14. März 2024, 17:00–19:00, Tent C
Characterization of a radiofrequency trap for electrons — •Vladimir Mikhailovskii1, Natalija Sheth1, Hendrik Bekker1, Guofeng Qu2, Yuzhe Zhang1, Ferdinand Schmidt-Kaler3, Christian Smorra3, Hartmut Häffner4, and Dmitry Budker1,3,4 — 1Helmholtz-Institut Mainz, GSI Helmholtzzentrum für Schwerionenforschung, Mainz, Germany — 2Institute of Nuclear Science and Technology, Sichuan University, Chengdu, China — 3Johannes Gutenberg-Universität, Mainz, Germany — 4Department of Physics, University of California, Berkeley, USA
We demonstrate trapping of electrons in a radiofrequency trap. The low charge-to-mass ratio of electrons puts special requirements on the experiment. First, we need electrons at low energies. Since electrons lack internal structure, which is commonly used to laser cool ions, it is necessary to produce them at low energies at the trap center. This is achieved by two-step photoionization of a Ca beam [1], where the atoms are ionized only slightly above the ionization threshold. Second, the trap must be operated at high frequencies. We have realized such a trap, consisting of three PCBs described in [2], and are currently characterizing its performance at 1.6 GHz in a UHV system. After loading the trap, the electrons are detected after a variable waiting time by extraction and subsequent detection with an electron multiplier tube. The results on the trap depth and the lifetime of the trapped electrons are presented.
[1] S. Gulde et al, Appl. Phys. B; 73, 861(2001)
[2] C. Matthiesen et al, Phys. Rev. X; 11, 011019 (2021)
Keywords: Paul trap; Radiofrequency trap; electrons trapping; Ca photoionization