@article{8348,
  author = {N. Bonanomi and P. Mantica and J. Citrin and C. Giroud and E. Lerche and C. Sozzi and D. Taylor and M. Tsalas and D. Van Eester and JET Contributors},
  title = {Effects of nitrogen seeding on core ion thermal transport in JET ILW L-mode plasmas},
  abstract = {A set of experiments was carried out in JET ILW (Joint European Torus with ITER-Like Wall) L-mode plasmas in order to study the effects of light impurities on core ion thermal transport. N was puffed into some discharges and its profile was measured by active Charge Exchange diagnostics, while ICRH power was deposited on- and off-axis in (3 He) - D minority scheme in order to have a scan of local heat flux at constant total power with and without N injection. Experimentally, the ion temperature profiles are more peaked for similar heat fluxes when N is injected in the plasma. Gyro-kinetic simulations using the GENE code indicate that a stabilization of Ion Temperature Gradient driven turbulent transport due to main ion dilution and to changes in T_e /T_i and s / q is responsible of the enhanced peaking. The quasi-linear models TGLF and QuaLiKiz are tested against the experimental and the gyro-kinetic results.
},
  year = {2018},
  journal = {Nuclear Fusion},
  volume = {58},
  pages = {026028},
  doi = {10.1088/1741-4326/aa9e7c},
  language = {eng},
}