Hard radiation
From SGCommand
Hard radiation is a term used to describe high-energy electromagnetic radiation. This kind of radiation was produced by Project Arcturus. As power output of Project Arcurus increased, new and exotic particles were continuously created and destroyed inside the containment chamber, interacting with each other and with the field itself. Eventually, particles were created that could not be prevented in this space-time, and they breached the containment field as hard radiation. (ATL: "Trinity")
