Precision Measurement of the Cosmic Ray Helium Flux with AMS Experiment
Abstract
AMS is a TeV range high energy physics experiment operating since May 2011 on board of the International Space Station on Low Earth Orbit. The precise helium spectrum as measured by AMS is presented in the rigidity range from 2 GV to 3 TV. Below 10 GV the spectrum is modulated by time dependent solar activity. Above 10 GV the spectrum can be parametrized by a single power law spectrum, modulated by solar activity with fitted solar potential value of φ = 0.5 ± 0.05 GV. No fine structures were found in the spectrum.
- Publication:
-
International Cosmic Ray Conference
- Pub Date:
- 2013
- Bibcode:
- 2013ICRC...33..287C
- Keywords:
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- Cosmic Rays Nuclei;
- He flux;
- AMS-02