According to theory, charged subatomic particles bounce like pinballs around the shock front. They pick up speed until they move nearly the speed of light. Last year, observations from NASA’s Chandra X-ray Observatory suggested that electrons are being accelerated rapidly (as fast as theory allows) to high energies in the supernova remnant Cassiopeia A.
But alpha particles, they are the heavy artillary - see 'protons'
Because of their charges, these protons can be accelerated by electrical or magnetic fields to high energies, and can thus become a dangerous form of particle radiation.a simple explanation