Slide 22 of 31
Notes:
Synchrotron radiation is observed from supernovae, thus particles with very high energies must be involved, which is a good sign. The total particle energy in a supernova explosion is estimated to be about 1e42 Joules (per supernova) (this is deduced from the synchrotron formula which gives the magnetic field, B, then arguing that the energy density in the magnetic field is the same as that in particles).
If one supernova goes off every 100 years, that would release 1e42/15e9 J/s, which is 3e32 J/s - thus SN are a likely source of cosmic rays.
Supernovae are also renowned for producing heavy elements of course.
