@article{8512, author = {J. R. Harrison and C. Theiler and O. FĂ©vrier and H. de Oliveira and R. Maurizio and K. Verhaegh and A. Perek and A. Karpushov and B. Lipschultz and W. A. J. Vijvers and B. P. Duval and X. Feng and S. Henderson and B. Labit and B. Linehan and A. Merle and H. Reimerdes and U. Sheikh and C. K. Tsui and C. Wuthrich and TCV team and EUROfusion MST1 Team}, title = {Progress toward divertor detachment on TCV within H-mode operating parameters}, abstract = {Recent experiments on Tokamak a Configuration Variable have made significant progress toward partial detachment of the outer divertor in neutral beam heated H-mode plasmas in conventional and alternative divertor configurations. The heating power required to enter H-mode was measured in a range of divertor configurations. It is found that at the core densities most favourable for H-mode access, the L-H threshold power is largely independent of the poloidal flux expansion and major radius of the outer divertor, and in the snowflake minus configuration. A factor 2 reduction in the outer divertor power load was achieved in ELM-free (using a fuelling and nitrogen seeding) and ELMy (using nitrogen seeding) H-mode plasmas. No significant reduction in the outer divertor particle flux was achieved in the ELM-free scenarios, compared with similar to 30% reduction in the most strongly detached ELMy cases. The poloidal flux expansion at the outer divertor was not found to significantly alter the cooling of the divertor in the ELM-free scenarios.}, year = {2019}, journal = {Plasma Physics and Controlled Fusion}, volume = {61}, pages = {065024}, doi = {10.1088/1361-6587/ab140e}, language = {eng}, }