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arXiv · 2401.00360

Production of highly charged ions inside a cryogenic Penning trap by electron-impact ionisation

Kanika·A Krishnan·J W Klimes·B Reich·K K Anjum·P Baus·G Birkl·W Quint·M Vogel
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Abstract

We have built and operated a cryogenic Penning trap arrangement that allows for the efficient production, selection, and long-term storage of highly charged atomic ions. In close similarity to an electron-beam ion trap (EBIT) it works by electron-impact ionisation of atoms inside a dedicated confinement region. The electrons are produced by field emission at liquid-helium temperature and are subsequently accelerated to the keV energy range. The electron beam is reflected through the trap multiple times to increase the ionisation efficiency. We show a characterisation of the system and measurements with argon and tungsten ions up to Ar$^{16+}$ and W$^{27+}$, respectively.

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Kanika, A Krishnan, J W Klimes, B Reich, K K Anjum, P Baus, G Birkl, W Quint, M Vogel. 2023-12-31. Production of highly charged ions inside a cryogenic Penning trap by electron-impact ionisation. https://doi.org/10.1088/1361-6455/ace9a1

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