Münster 2017 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 72: Postersitzung Teilchenphysik

T 72.9: Poster

Dienstag, 28. März 2017, 16:45–19:00, F Foyer

Recent results of antiproton manipulation in the AEḡIS collaboration — •Ingmari Christa Tietje — Route de Meyrin 385, 1217 Meyrin, Switzerland

In the beginning of the universe same amounts of matter and antimatter were produced from a singularity in energy. Most of the matter annihilated with antimatter immediately and ultimately gave rise to the cosmic background radiation. A small fraction of matter did not annihilate and formed the universe. But why do we observe primordial matter and no primordial antimatter in the universe and which are the reasons for the baryon asymmetry? At the antiproton decelerator (AD) at CERN low-energy antiprotons are provided to a number of different experiments. The collaboration of one of the experiments AEḡIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) aims for a test of the weak equivalence principle of antimatter. To approach this goal experimental techniques from different fields are required. One of these fields is plasma physics: A crucial step is to catch and store the negatively charged antiprotons provided by the AD in Penning traps. Through collisions with electrons in a cryogenic environment the antiprotons are sympathetically cooled as low as cryogenic temperatures. Here we present recent results of measurements carried out with antiprotons inside the AEḡIS experimental setup. This comprises results about two-component electron-antiproton plasmas as well as ballistic transfer of antiprotons. The control we possess over the antiprotons enables us to pursue the ultimate goal of AEḡIS - to test the weak equivalence principle with antihydrogen.