Berlin 2014 – scientific programme
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A: Fachverband Atomphysik
A 14: Poster: Precision spectroscopy of atoms and ions (with Q)
A 14.15: Poster
Monday, March 17, 2014, 16:30–18:30, Spree-Palais
Towards precision laser spectroscopy with cold highly charged ions — •Lisa Schmöger1,2, Oscar O. Versolato1,2, Maria Schwarz1,2, Alexander Windberger1, Matthias Kohnen2, Tobias Leopold2, Joachim Ullrich2, Piet O. Schmidt2,3, and José R. Crespo López-Urrutia1 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, Heidelberg — 2Physikalisch-Technische Bundesanstalt, Bundesallee 100, Braunschweig — 3Institut für Quantenoptik, Leibniz Universität Hannover, Hannover
Highly charged ions (HCI) are promising candidates for bound-state QED studies (g-factor measurements), metrology (optical clocks) and searches for a possible variation of the fine structure constant.
Electron beam ion traps (EBIT) have recently enabled laser spectroscopic studies of trapped HCI. However, large translational temperatures in HCI trapped in an EBIT severely limit resolution. To overcome this, our cryogenic linear Paul trap experiment -CryPTEx- in combination with an EBIT will enable trapping and sympathetic cooling of a wide range of HCI by means of Be+ ions laser-cooled into Coulomb crystals. The external ion injection capabilities of our Paul trap have been successfully tested and the formation of Be+ Coulomb crystals is underway.
This new setup opens up a path towards high-precision laser spectroscopy up to optical frequency standards based on narrow transitions in HCI, which are by orders of magnitudes less susceptible to external perturbations than transitions in atoms or singly-charged ions, and which offer fundamental physics test at the highest sensitivities.