A stellarator is a type of nuclear fusion reactor designed to confine hot plasma using magnetic fields. Unlike other designs, such as the tokamak, a stellarator uses twisted magnetic coils to create a stable environment for fusion reactions. This design helps to maintain the plasma's shape and temperature, which are crucial for achieving fusion. The unique geometry of a stellarator allows for continuous operation without the need for pulsed magnetic fields. This can lead to improved efficiency and reduced wear on the reactor components. Researchers are exploring various configurations to optimize performance and enhance the viability of fusion energy as a sustainable power source.