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Cosmic Ray Energy Spectrum in the Heliosphere

Abstract:

There is an anisotropy in the detection of TeV particles incident on our solar system from interstellar space. These particles, known as cosmic rays, consist of mainly protons, helium, and other atomic nuclei and propagate through our solar system by spiraling along magnetic field lines. The heliospheric magnetic field is known to have an effect on the trajectories of cosmic rays, and we are analyzing how this magnetic field affects the trajectories at various energies differently. Using Liouville's Theorem and time-reversibility, we simulated anti-protons originating from Earth backwards in time. These simulations provided us with regions in the sky that are magnetically connected to Earth's approximate position in the solar system, from which we then simulated protons forward in time. By measuring the energy spectrum of particles incident on target spheres of various sizes around the Earth, we found that the heliosphere …