Hannover 2010 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 23: Poster II

A 23.17: Poster

Donnerstag, 11. März 2010, 16:30–19:00, Lichthof

A cryogenic Paul Trap for highly charged ions — •Maria Schwarz, Franziska R. Brunner, José R. Crespo López-Urrutia, and Joachim Ullrich — Max-Planck-Institut für Kernphysik, Heidelberg, Deutschland

An electron beam ion trap (EBIT) is an effective tool for spectroscopy of highly charged ions (HCIs). However, the deep trapping potential found there can cause high temperatures of the stored ions, thereby limiting the final resolution. To allow for better accuracy we have started building up a linear cryogenic Paul-Trap experiment (CryPTEx) online with an EBIT. Storage times of HCIs could be extended to by orders of magnitude due to the extremely low background pressure which can be achieved in a 4K enclosure. Furthermore, the device allows sympathetic cooling with laser-cooled singly charged ions. Thus, much higher precision in atomic spectroscopy even down to the natural line width of the forbidden transitions of the stored HCIs should be achievable. In addition, addressing individual ions becomes also possible, since these arrange themselves in stable Coulomb crystals.