Rostock 2019 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
A: Fachverband Atomphysik
A 22: Highly charged ions and their applications
A 22.5: Poster
Mittwoch, 13. März 2019, 16:15–18:15, S Fobau Physik
UV laser systems for sympathetic cooling of highly charged ions using 9Be+ — •Sandra Bogen, Julian Stark, Lukas Spieß, Lisa Schmöger, Lena Haaga, and José R. Crespo López-Urrutia — Max-Planck-Institut für Kernphysik, Heidelberg, Germany
Narrow optical transitions in highly charged ions (HCI) are promising candidates to search for physics beyond the Standard Model [1]. For the purpose of such high-precision experiments, the HCI need to be trapped and cooled. As HCI generally lack suitable optical transitions for laser cooling, sympathetic cooling with laser-cooled 9Be+ is employed [2]. In order to photo ionize 9Be atoms, a laser at 235 nm based on [3] is used. It is generated by cavity-enhanced frequency doubling of a 940 nm diode laser twice, first using a PPKTP crystal and then a BBO crystal. This laser is resonant with the 2s1S0 −2p1P1 transition of the 9Be atom, which is used for resonance-enhanced two-photon-ionization. The 9Be+ ions are Doppler-cooled via the 2 S1/2−2 P3/2 transition at 313 nm based on [4]. This laser is generated from two fiber lasers at 1051 nm and 1550 nm. By sum frequency generation inside a PPLN crystal, 626 nm light is produced, which subsequently is frequency doubled using cavity-enhanced second harmonic generation in a BBO crystal to generate the needed 313 nm light.
[1] M. G. Kozlov et al., arXiv:1803.06532 (2018)
[2] L. Schmöger et al., Science 347 (2015)
[3] H.-Y. Lo et al., Appl. Phys. B, 114:17-25 (2014)
[4] A.C. Wilson et al., Appl. Phys. B 105:741-748 (2011)