Speaker
Iris Gebauer
(KIT - Karlsruhe Institute of Technology (DE))
Description
The Alpha Magnetic Spectrometer (AMS-02) is a state-of-the-art particle
detector designed to operate as an external module on the International
Space Station (ISS). In this unique space environment cosmic particles
can be measured with high precision over an energy range from GeV up to
a few TeV. In 2014, the AMS collaboration provided precise measurements of the electron and positron fluxes, which indicate an additional source of positrons among the various cosmic particles. The arrival directions of
energetic $e^{\pm}$ in the range of hundreds of GeVs
convey fundamental information on their origin, whereas low energy $e^{\pm}$ in the MeV to tens of GeV
range are subject to time dependent solar modulations.
We evaluate the AMS-02 detector acceptance as a function of incoming
angle in the detector frame. Using the detector pointing information
over the entire AMS-02 data taking period, we build time dependent
skymaps in galactic coordinates of the $e^{\pm}$ incoming directions, as
well as time dependent reference maps. The latter simulate the expected
AMS-02 measurement of isotropic fluxes. Our maps allow us to study
possible anisotropies in the arrival directions of energetic $e^{\pm}$, as
well as time and direction
dependent effects at low energies due to the influence of the solar
wind. This technique can be applied to protons and other cosmic ray
species. We demonstrate the performance of the method using AMS-02 data.
| Registration number following "ICRC2015-I/" | 717 |
|---|---|
| Collaboration | AMS |
Authors
Carmen Maria Merx
(KIT - Karlsruhe Institute of Technology (DE))
Iris Gebauer
(KIT - Karlsruhe Institute of Technology (DE))
Karen Grace Andeen
(KIT - Karlsruhe Institute of Technology (DE))
Nikolay Nikonov
(KIT - Karlsruhe Institute of Technology (DE))
Stefan Zeissler
(KIT - Karlsruhe Institute of Technology (DE))
Valerio Vagelli
(KIT - Karlsruhe Institute of Technology (DE))
