2000 character limit reached
Production of highly charged ions inside a cryogenic Penning trap by electron-impact ionisation (2401.00360v1)
Published 31 Dec 2023 in physics.atom-ph
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.