Perturbative experiments are essential to understand the complex transport phenomena in fusion plasmas. The perturbative methods used for transport studies are summarized and the main properties discussed. Based on this approach, transport of particles, heat and momentum has been intensively investigated. The main results obtained for the different channels are described and illustrated with selected examples.
Ryter, F., Dux, R., Mantica, P., & Tala, T. (2010). Perturbative studies of transport phenomena in fusion devices. Plasma Physics and Controlled Fusion, 52(12), . https://doi.org/10.1088/0741-3335/52/12/124043