Take a look at this thing! 👀 It's a plasma toroid — it starts with a glass globe evacuated and filled with xenon. A coil is placed around the globe with a high-frequency current (10 million cycles per second). The current excites a plasma inside the globe, but due to the coil's magnetic field, the plasma is confined to a toroidal (doughnut-like 🍩) space, forming a plasma toroid. The plasma circulates inside the globe indefinitely. ⚡ To see even more cool high-voltage gadgets, join Harvard Univ