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A: Fachverband Atomphysik
A 22: Highly charged ions and their applications
A 22.4: Poster
Mittwoch, 13. März 2019, 16:15–18:15, S Fobau Physik
Development of a stabilized laser system for Raman sideband cooling of 9Be+ atoms — •Lena Haaga, Julian Stark, Sandra Bogen, Christian Warnecke, Lukas Spiess, Lisa Schmöger, and José R. Crespo López-Urrutia — Max-Planck-Institut, Heidelberg, Deutschland
Forbidden optical transitions in highly charged ions (HCIs) are less sensitive to external influences than state-of-the-art atomic transitions used for metrology [1]. Also, they are promising candidates to probe physics beyond the Standard Model, as they feature an enhanced sensitivity to variation of fundamental constants [2]. As HCIs lack suitable optical transitions they cannot be laser-cooled directly. Thus, co-trapped laser-cooled 9Be+ ions are used for sympathetic cooling in a cryogenic Paul trap [3]. To reach Temperatures beyond the Doppler limit, sideband cooling using a Raman transition at 313 nm is applied, transferring the HCIs and 9Be+ to their motional ground state [4]. We present the design of this Raman laser setup based on [5], where light at 626 nm is frequency doubled to 313 nm and then shifted to the motional sidebands of the trapped ions by passing acousto-optic modulators.
[1] V.A. Dzuba et al., Phys. Rev. A 86, 054502 (2012)
[2] J.C. Berengut et al., Phys. Rev. Lett. 106, 210802 (2011)
[3] L. Schmöger et al., Rev. Sci. Instrum. 86, 103111 (2015)
[4] D.J. Wineland et al., Phys. Rev. A 20, 1521 (1979)
[5] A.C. Wilson et al., Appl. Phys. B 105, 741 (2011)