Münster 2017 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 83: Kosmische Strahlung 6
T 83.4: Vortrag
Mittwoch, 29. März 2017, 17:35–17:50, H 3
Antiproton Flux and Antiproton-to-Proton Flux Ratio Measured with the Alpha Magnetic Spectrometer on the ISS — •Andreas Bachlechner — RWTH Aachen University
AMS-02 is a multi-purpose particle detector for cosmic rays onboard the International Space Station.
Due to the very small abundance of antiprotons in the cosmic radiation of about 10−5 compared to protons a very precise particle identification is crucial. The methods to identify antiprotons in the cosmic-ray measurement of AMS-02 in different energy regions will be discussed.
The precision measurement of the antiproton flux by AMS-02 and the antiproton-to-proton flux ratio in primary cosmic rays in the absolute rigidity range from 1 to 450 GV based on 3.49 ×105 antiproton events and 2.42 ×109 proton events will be presented. The antiproton-to-proton flux ratio reaches a maximum at approximately 20 GV and is rigidity independent above 60.3 GV.