@article{8877, author = {T.S. Pedersen and I. Abramovic and P. Agostinetti and Agredano Torres and S. Akaslompolo and Alcuson Belloso and P. Aleynikov and K. Aleynikova and M.J. Pueschel and M.R. de Baar and M. Alhashimi and A. Ali and N. Allen and A. Alonso and G. Anda and T. Andreeva and C. Angioni and A. Arkhipov and A. Arnold and W. Asad and E. Ascasibar and M.H. Aumeunier and K. Avramidis and E. Aymerich and S.G. Baek and J. Baehner and A. Baillod and M. Balden and J. Baldzuhn and S. Ballinger and M. Banduch and S. Bannmann and Bañón Navarro and T. Barbui and C. Beidler and C. Belafdil and A. Bencze and A. Benndorf and M. Beurskens and C. Biedermann and O. Biletskyi and B. Blackwell and M. Blatzheim and T. Bluhm and D. Bockenhoff and G. Bongiovi and M. Borchardt and D. Borodin and J. Boscary and H.S. Bosch and T. Bosmann and B. Böswirth and L. Bottger and A. Bottino and S. Bozhenkov and R. Brakel and C. Brandt and S. Brezinsek and J. Hawke and D. Moseev and M. Schneider and P. Schneider and T. Szepesi and E. Wang and H. Wang and et al. and H. Zohm and S. Zoletnik and L. Zsuga}, title = {Experimental confirmation of efficient island divertor operation and successful neoclassical transport optimization in Wendelstein 7-X}, abstract = {We present recent highlights from the most recent operation phases of Wendelstein 7-X, the most advanced stellarator in the world. Stable detachment with good particle exhaust, low impurity content, and energy confinement times exceeding 100 ms, have been maintained for tens of seconds. Pellet fueling allows for plasma phases with reduced ion-temperature-gradient turbulence, and during such phases, the overall confinement is so good (energy confinement times often exceeding 200 ms) that the attained density and temperature profiles would not have been possible in less optimized devices, since they would have had neoclassical transport losses exceeding the heating applied in W7-X. This provides proof that the reduction of neoclassical transport through magnetic field optimization is successful. W7-X plasmas generally show good impurity screening and high plasma purity, but there is evidence of longer impurity confinement times during turbulence-suppressed phases.}, year = {2022}, journal = {Nuclear Fusion}, volume = {62}, pages = {042022}, publisher = {IOP Publishing}, doi = {10.1088/1741-4326/ac2cf5}, language = {eng}, }