Research ArticleOpen accessIn the keywordsAcceleration and Particle Field Interactions of Cosmic Rays: FormalismA. Tawfik, A. Saleh, M.T. Ghoneim, A.A. HadyThe origin and acceleration theories of Ultrah High Energy Cosmic Rays (UHECRs) are still mesterious problem in modern physics and astrophysics. The acceleration of ultra high energy cosmic rays is conjectured to occur through interactions with electromagnetic fields in different astrophysical objects, like magnetic matter clumps, besides the well-known shock waves and elastic Fermi mechanisms. Based on this model, a … …Physics International, Vol. 3, Issue 2 · 18 May 2013 · 7,458 accessesView PDFCite