Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 61: Kosmische Strahlung III

T 61.9: Talk

Wednesday, March 27, 2019, 18:10–18:25, S13

Large Acceptance Analysis of Electrons and Positrons with AMS-02 — •Fabian Machate — 1. Physikalisches Institut B, RWTH Aachen University

The Alpha Magnetic Spectrometer (AMS-02) on the International Space Station performs precision measurements of cosmic rays in the GeV to TeV energy range. The published analyses of the electron and positron fluxes rely on the electromagnetic calorimeter (ECAL) for energy measurements and background rejection. The geometrical acceptance for the conventional analyses is restricted by the weight limitations for the calorimeter.

A new analysis method using information from the Transition Radiation Detector (TRD) and Tracker will be presented, with particular emphasis on background rejection with the TRD. This analysis has a significantly larger geometrical acceptance and can increase the statistics by a factor of up to  ∼ 4 .