A stellarator is a type of nuclear fusion device designed to confine hot plasma using magnetic fields. Unlike other fusion reactors, such as tokamaks, stellarators have a twisted, helical shape that helps maintain stability without the need for a large electric current. This design aims to achieve controlled fusion reactions, which could provide a nearly limitless source of clean energy. Stellarators are complex machines that require precise engineering to create the necessary magnetic fields. Researchers are exploring various designs and configurations to improve their efficiency and performance. Notable examples include the Wendelstein 7-X in Germany, which is one of the largest stellarators currently in operation.