Erlangen 2018 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 22: Matter Wave Optics II

Q 22.3: Vortrag

Montag, 5. März 2018, 16:45–17:00, K 1.013

Talbot-Lau interferometer for antimatter — •Andrea Demetrio¹, Simon R. Müller¹, Pierre Lansonneur², and Markus K. Oberthaler¹ — ¹Kirchhoff-Institut für Physik, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany — ²Institut de Physique Nucléaire de Lyon, CNRS/IN2P3, 69622 Villeurbanne, France

The Talbot-Lau interferometer has been used to perform measurements in the near-field regime with several different particle species in the past two decades. In order to deal with divergent, low intensity sources, such as currently available for antimatter, a large geometrical acceptance is desirable. We discuss that this directly translates into very stringent limits on the alignment of its components, depending on the diffusivity of the beam. Furthermore, when considering charged particles, the influence of external electric and magnetic fields plays a role in degrading the fringe visibility, especially as the length of the device increases. We present a concrete application of these principles to an experimental test setup with protons and discuss the implications for antimatter experiments.