Berlin 2014 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 14: Poster: Precision spectroscopy of atoms and ions (with Q)
A 14.18: Poster
Montag, 17. März 2014, 16:30–18:30, Spree-Palais
Production of highly charged ions and their applications — •Hendrik Bekker1, Daniel Hollain1, Nihmal Daya2, Elias Sideras-Haddad2, Sergey Eliseev1, Sven Sturm1, Klaus Blaum1, and José R. Crespo López-Urrutia1 — 1Max-Planck-Institut für Kernphysik — 2University of the Witwatersrand
Preparations are under way to bring the Heidelberg electron beam ion trap (HD-EBIT) to higher energy operation, with the aim to reach electron beam energies up to 350 keV at currents up to 500 mA. This will allow us to produce and trap hydrogen-like charge states of all the stable elements. The first goal is the production of hydrogen-like holmium and rhenium, which have a ground-state hyperfine splitting (HFS) in the optical regime. We expect to be able to measure the HFS with a precision at the ppm level, a hundred-fold improvement over previous measurements. An application of extracted ions has been the use of a range of Xe charge states to study the effects of highly charged ions on graphene. The produced defects are expected to generate magnetic defects which should give rise to a measurable Kondo effect. Future plans include the production of high charge states of lead, which will be transported to the Penning traps PENTATRAP and ALPHATRAP for precise measurements of masses and of the bound electron g-factor, from which the 1s electron binding energy and the fine-structure constant can be extracted.