The Virtual Sensor
Researchers have developed an artificial intelligence to see inside the violent heart of a fusion reactor. The system, created by a Princeton-led team, generates data for sensors that are broken or too slow. This innovation is not just a research tool. It is a critical step toward building simpler, more reliable fusion power plants capable of powering the grid. Inside a steel doughnut in California, a star is born and dies a thousand times a second. The machine is the DIII-D National Fusion Facility. The goal is clean energy, the same power that fires the sun. But the star fights back. It is violent, unstable. And for the scientists watching, the action is often a blur. The instruments built to measure the plasma—the superheated gas inside—cannot always keep up. A critical sensor might fail. Another might be too slow. The picture goes dark, just when clarity is most needed. ...