Item from The Hunger Games by Suzanne Collins
An invisible electromagnetic barrier enclosing every arena — the cage that keeps tributes trapped and the technology that Beetee shattered to break Katniss out of the Quarter Quell and into a revolution.
The force field is the arena's absolute boundary — no tribute escapes, no outside force enters. It's also the Gamemakers' safety net, ensuring the artificial environment stays contained. Peeta discovered the field in the Quarter Quell when he walked into it and was nearly killed by the electrical discharge — his heart stopped and Finnick resuscitated him. That near-death revealed the field's location and properties. Beetee — the electronics genius from District 3 — devised the plan: wire the lightning tree to the force field using conductive wire, wait for the midnight lightning strike, and channel the current into the barrier. The overload would short-circuit the field and breach the arena. Katniss finished the job when Beetee couldn't, wrapping the wire around her arrow and firing it into the barrier at the moment lightning struck. The sky shattered like glass. The arena died. The rebellion was born from an engineering exploit that turned the Capitol's own containment technology against itself.
Completely invisible under normal conditions. When struck, it shimmers with a faint golden ripple and repels anything on contact with concussive force. The barrier extends from ground to sky, forming an impenetrable dome.
Also known as: the force field, arena barrier, the dome