Rostock 2019 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 3: Precision Spectroscopy of atoms and ions I (joint session A/Q)
A 3.2: Vortrag
Montag, 11. März 2019, 10:45–11:00, S HS 2 Physik
Spectroscopy of the 1S0 − 3P1 intercombination line of calcium — •Markus Kirkines and Simon Stellmer — Physikalisches Institut der Universität Bonn, Nussallee 12, 53115 Bonn
Over the past decades, microwave frequency references have been outperformed by optical frequency standards, and there is a worldwide quest to build optical clocks that can be operated outside the laboratory. We aim to build an atomic beam clock of calcium that is not only compact in size and firm against external influences, but also has a fractional frequency stability in the order of 10−16. As a preparatory experiment, we will perform Doppler-free spectroscopy on the 1S0 − 3P1 intercombination line of calcium which is the designated clock transition (λ=657 nm and Γ=2π×370 Hz). The spectroscopy cell is designed such that the linewidth broadening (e.g. collisional and transient broadening) of the atomic transition linewidth are kept below a few kHz. The cell should not only minimize the line broadening of the atomic transition, but should also provide high durability so that it can run without maintenance for years. We investigate different spectroscopy cell setups which will be presented in the talk.