This tabletop stellarator @plasmaphysik@wisskomm.social in Greifswald demonstrates to visitors how magnetic fields confine plasmas. Two parallel coils outside the vacuum chamber & two intertwined, water-cooled coils inside keep the visible low-temperature plasma stably in place. Each pair of coils has its own power supply for independent control—allowing visitors to test how a plasma can be stabilized most effectively / Picture: Paolo Verzone #Plasmaphysics #Plasma #Wendelstein7x