Fusion reactors are devices designed to replicate the process that powers the sun, where atomic nuclei combine to form heavier nuclei, releasing vast amounts of energy. This process, known as nuclear fusion, has the potential to provide a nearly limitless and clean energy source, as it produces minimal radioactive waste compared to traditional nuclear fission reactors. In a fusion reactor, isotopes of hydrogen, such as deuterium and tritium, are heated to extremely high temperatures, allowing them to overcome their natural repulsion and fuse together. Research is ongoing in various projects, including the International Thermonuclear Experimental Reactor (ITER), to develop practical and efficient fusion energy systems for future use.