Mainz 2017 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 14: Highly Charged Ions
A 14.4: Vortrag
Dienstag, 7. März 2017, 15:15–15:30, HS 20
A superconducting resonator-driven linear radio-frequency trap for long-time storage of highly charged ions — •Julian Stark1, Lisa Schmöger1,2, Andrii Borodin1, Janko Nauta1, Dieter Liebert1, and José R. Crespo López-Urrutia1 — 1Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2Physikalisch-Technische Bundesanstalt, Braunschweig, Germany
Cold, strongly localized highly charged ions (HCIs) are particularly interesting candidates for novel frequency standards at a potential 10−19 level of relative accuracy and the search for possible variations of fundamental constants. Motional cooling of HCIs down to the mK range can be achieved by sympathetic cooling with directly laser-cooled Be+ ions inside a cryogenic linear radio-frequency (RF) Paul trap [1,2]. For a stable localization of the trapped ions a high voltage RF field with low noise is required. Here, a novel superconducting RF resonator design with integrated Paul trap electrodes is presented. The high quality factor Q of the resonator will drastically reduce Paul trap heating rates as well as improve the overall stability of the trapping conditions. A normal-conducting prototype is currently being commissioned. First measurements yield a quality factor of 5816(23) at a resonance frequency of 29.772(4) MHz. In the superconducting version a much higher Q value will render electrodynamical losses of trapped ions negligible. This will enable precise localization of HCIs which is needed for high precision laser spectroscopy.
[1] M. Schwarz et al., Rev. Sci. Instrum. 83, 083115 (2012)
[2] L. Schmöger et al., Science 347, 6227 (2015)