Vincenzi, P., Solano, E. R., Delabie, E., Angioni, C., Birkenmeier, G., Maggi, C., et al. (2025). Non-linear dependence of ion heat flux on plasma density at the L–H transition of JET NBI-heated deuterium–tritium plasmas. Nuclear Fusion, 65: 016038. doi:10.1088/1741-4326/ad96cd.