Lecture notes on high energy cosmic rays

TL;DR

This paper provides a basic overview of high energy cosmic ray physics, including related gamma-ray and neutrino astrophysics, focusing on astrophysical questions with accessible explanations.

Contribution

It offers a concise, accessible introduction to high energy cosmic rays and related astrophysics, emphasizing key astrophysical questions and concepts.

Findings

Summarizes fundamental concepts of high energy cosmic rays

Highlights connections between cosmic rays, gamma rays, and neutrinos

Provides foundational knowledge for further astrophysics research

Abstract

I give a concise introduction into high energy cosmic ray physics, including also few related aspects of high energy gamma-ray and neutrino astrophysics. The main emphasis is placed on astrophysical questions, and the level of the presentation is kept basic.