Joachim Isbert

TL;DR: An excess of galactic cosmic-ray electrons at energies of ∼300–800 GeV is reported, which indicates a nearby source of energetic electrons, or the electrons could arise from the annihilation of dark matter particles.

TL;DR: In this article, the results of measurements performed in the course of the ATIC-2 balloon experiment (2002-2003) for the energy spectra of particles (such as protons; He, C, O, Ne, Mg, Si, and Fe nuclei; and some groups of nuclei) and the allparticle energy spectrum in primary cosmic rays at energies ranging from 50 GeV to 200 TeV.

TL;DR: The Advanced Thin Ionization Calorimeter (ATIC) experiment as discussed by the authors is built around a fully active, Bismuth-Germanate (BGO) ionization calorimeter to measure the energy deposited by cascades formed by particles interacting in a thick carbon target.

TL;DR: The Advanced Thin Ionization Calorimeter (ATIC) balloon experiment is designed to investigate the composition and energy spectra of cosmic rays at the highest energies currently accessible by direct measurements as mentioned in this paper.

TL;DR: In this paper, the authors measured the energy deposited by a cascade of nuclear and electromagnetic inter-tions in eight layers arranged in orthogonal pairs to measure the energy of a particle.