A hypervelocity railgun works very much like a particle accelerator insofar as it converts electrical potential energy into kinetic energy imparted to the projectile.
The energy of this particle is some 40 million times that of the highest energy protons that have been produced in any terrestrial particle accelerator.
For instance, the processing of medical isotopes, having been irradiated in a nuclear reactor or particle accelerator, would be carried out in a hot cell.