Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

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

A 35.3: Poster

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

Single-shot 3D-imaging of mixed-species coulomb crystals with a plenoptic camera — •Baptist Piest1, Lisa Schmöger1,2, and José R. Crespo López-Urrutia11Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg — 2Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig

It has recently been demonstrated in [1], that it is possible to combine light field microscopy techniques [2] with three-dimensional (3D) deconvolution to obtain the 3D-structure of dilute atomic gas clouds. A similar setup is currently being setup at the Cryogenic Paul Trap Experiment (CryPTEx) [3]. It is of particular interest for understanding the spatial structure of 3D Be+-coulomb crystals with individually implanted highly charged ions and as input for molecular-dynamics simulations. For this purpose, the construction is optimized for imaging the fluorescent light of the 2S1/2 - 2P3/2 transition in 9Be+ driven by a cooling-laser at 313 nm. The spatial structure can be obtained in two steps: The first one is the digital refocussing of the light field to a stack of different focal planes. The second step requires the numerical deconvolution of the refocused images with the 3D point spread function (PSF). The measurement of the PSF is thus an essential step for a successful application of this technique.

[1] K. Sakmann and M. Kasevich, arXiv:1405.3598 [physics.atom-ph] (2014).

[2] M. Levoy et al., ACM Transactions on Graphics 25(3), Proc. SIGGRAPH (2006).

[3] M. Schwarz et al. Rev. Sci. Instr. 83, 083115 (2012).

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