Nuclear fusion is the process that powers the stars and releases large amounts of energy. On Earth conditions to sustain fusion reactions in a plasma are difficult to obtain but still possible, and scientific research has put significant effort into achieving controlled fusion reactions, aiming at generating electricity. In this context, the functioning of tokamak reactors is pivotal to the advancement of the technology and to its future implementation on large scales. Though experimental results have been promising in the last years, much work still needs to be done before being able to fully understand the problems related to the stability of the plasma in these reactors.