NorCC seminar: Michael Doser (CERN)

Tuesday 19 Sept 2023, 12:00 → 13:00 Europe/Zurich

Eli Baverfjord Rye (University of Oslo (NO)), Heidi Sandaker (University of Oslo (NO))

NorCC seminar series

The NorCC seminar series takes place the third Tuesday of every month, usually at 12AM CET, and invites both external an internal speakers. Each seminar will be maximum one hour, and is an arena to present and discuss a range of topics reflecting the different fields within the center. 

What is NorCC?

The Norwegian center for CERN-related research is a national center which aims to organize and finance the Norwegian participation in the large and long-term experiments at CERN. This translates into pioneering research in particle and nuclear physics, exploration of new technology and development of networks and opportunities. We will also focus on training the new generation of scientists and engineers and prepare them for the road ahead.

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12:00 → 13:00 Pulsed production of antihydrogen and other antiprotonic systems for precisions tests of fundamental symmetries

The production of cold antihydrogen atoms at CERN's Antiproton Decelerator (AD) has opened up the possibility to perform direct measurements of the Earth's gravitational acceleration on antimatter bodies. This is the main goal of the AEgIS collaboration: to measure the value of g using a pulsed source of cold horizontally travelling antihydrogen via a moiré deflectometer/Talbot-Lau interferometer. The first milestone of pulsed production of antihydrogen [1] using a resonant charge-exchange reaction between cold trapped antiprotons and Rydberg positronium (or Ps, the atomic bound state of a positron and an electron) atoms, and the techniques it relies on, will be presented. The outlook in enhancing the intensity of the pulsed antihydrogen source thanks to the 100 keV ELENA decelerator antiproton beam will be discussed, with a view to the first gravitational experiments using a pulsed beam of antihydrogen in the near future. Further physics directions in AEgIS relying on similar pulsed interactions in positronium or between antiprotons and Rydberg atoms and molecules will also be touched upon, as they open up unexplored venues in nuclear physics and novel precision tests of fundamental symmetries.
[1] C. Amsler et al. (The AEgIS collaboration), Pulsed production of antihydrogen, Commun. Phys. 4, 19 (2021) https://doi.org/10.1038/s42005-020-00494-z

Speaker: Michael Doser (CERN)