Where is the world's biggest plasma physics experiment located?

Plasma physics has several major flagship facilities, but ITER in Cadarache, France, is the largest fusion plasma project currently under construction. It is designed to confine and study extremely hot plasma in a tokamak so scientists can test fusion energy at scale. The National Ignition Facility in Livermore, California, is another major plasma physics site, using lasers to compress and heat plasma to stellar-like conditions. Together, these facilities explore the behavior of the fourth state of matter under some of the most extreme environments on Earth.