@article{8991, author = {E.R. Solano and G. Birkenmeier and C. Silva and E. Delabie and J.C. Hillesheim and A. Baciero and I. Balboa and M. Baruzzo and A. Boboc and A. Ho and M. Brix and J. Bernardo and C. Bourdelle and et al. and G. Verdoolaege and P. Vincenzi and B. Viola and N. Vianello and T. Wilson and JET Contributors}, title = {L-H transition studies in tritium and deuterium–tritium campaigns at JET with Be wall and W divertor}, abstract = {
The recent deuterium–tritium campaign in JET-ILW (DTE2) has provided a unique opportunity to study the isotope dependence of the L-H power threshold in an ITER-like wall environment (Be wall and W divertor). Here we present results from dedicated L-H transition experiments at JET-ILW, documenting the power threshold in tritium and deuterium–tritium plasmas, comparing them with the matching deuterium and hydrogen datasets. From earlier experiments in JET-ILW it is known that as plasma isotopic composition changes from deuterium, through varying deuterium/hydrogen concentrations, to pure hydrogen, the value of the line averaged density at which the threshold is minimum, ñ e,min, increases, leading us to expect that ñ e,min(T) < ñ e,min(DT) < ñ e,min(D) < ñ e,min(H). The new power threshold data confirms these expectations in most cases, with the corresponding ordering of the minimum power thresholds. We present a comparison of this data to power threshold scalings, used for extrapolation to future devices such as ITER and DEMO.
}, year = {2023}, journal = {Nuclear Fusion}, volume = {63}, pages = {112011}, publisher = {IOP Publishing}, doi = {10.1088/1741-4326/acee12}, language = {eng}, }