Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 35: Poster: Precision spectroscopy of atoms and ions (with Q)

A 35.12: Poster

Donnerstag, 26. März 2015, 17:00–19:00, C/Foyer

A superconducting resonator-driven linear radio-frequency trap for strong confinement of highly charged ions — •Julian Stark¹, Lisa Schmoeger^{1, 2}, and José R. Crespo López-Urrutia¹ — ¹Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg — ²Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig

Cold, strongly localized highly charged ions (HCI) are interesting candidates for both novel frequency standards at a potential 10⁻¹⁹ level accuracy and quantum information protocols. For sympathetic cooling of the HCI, they are simultaneously trapped with laser-cooled Be⁺ ions in a cryogenic linear radio-frequency (RF) Paul trap [1]. Its pseudopotential is strongly dependent on the RF amplitude, phase and frequency. Stable localization requires a high voltage RF drive with low noise, since instabilities in the RF drive cause excess micromotion and thus heating of the trapped ions. Employing a RF resonator with high quality factor Q inside the trap enables high amplitudes and drastically reduces the RF noise. In order to be able to trap and sympathetically cool HCI efficiently, we are currently designing a superconducting RF resonator which includes the quadrupole trapping electrodes. Integrating them into the RF cavity will suppress coupling losses and maintain a very high Q value, as well as improve the overall stability of the trapping conditions.

[1] M. Schwarz et al., Rev. Sci. Instrum. 83, 083115 (2012)