ISS Alpha Magnetic Spectrometer
The Alpha Magnetic Spectrometer (AMS-02) is a particle physics experiment module that is mounted on the International Space Station (ISS). It is designed to measure antimatter in cosmic rays and search for evidence of dark matter. This information is needed to understand the formation of the Universe. The principal investigator is Nobel laureate particle physicist Samuel Ting. By April 15, 2015, AMS-02 had recorded over 60 billion cosmic ray events since its installation.