000172837 001__ 172837 000172837 005__ 20240711113542.0 000172837 0247_ $$2doi$$a10.1088/0029-5515/54/1/013011 000172837 0247_ $$2ISSN$$a0029-5515 000172837 0247_ $$2ISSN$$a1741-4326 000172837 0247_ $$2WOS$$aWOS:000329427100015 000172837 0247_ $$2Handle$$a2128/31909 000172837 037__ $$aFZJ-2014-06274 000172837 082__ $$a530 000172837 1001_ $$0P:(DE-HGF)0$$aJoffrin, E.$$b0$$eCorresponding Author 000172837 245__ $$aFirst scenario development with the JET new ITER-like wall 000172837 260__ $$aVienna$$bIAEA$$c2014 000172837 3367_ $$2DRIVER$$aarticle 000172837 3367_ $$2DataCite$$aOutput Types/Journal article 000172837 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1664342232_12652 000172837 3367_ $$2BibTeX$$aARTICLE 000172837 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000172837 3367_ $$00$$2EndNote$$aJournal Article 000172837 520__ $$aIn the recent JET experimental campaigns with the new ITER-like wall (JET-ILW), major progress has been achieved in the characterization and operation of the H-mode regime in metallic environments: (i) plasma breakdown has been achieved at the first attempt and X-point L-mode operation recovered in a few days of operation; (ii) stationary and stable type-I ELMy H-modes with βN ~ 1.4 have been achieved in low and high triangularity ITER-like shape plasmas and are showing that their operational domain at H = 1 is significantly reduced with the JET-ILW mainly because of the need to inject a large amount of gas (above 1022 D s−1) to control core radiation; (iii) in contrast, the hybrid H-mode scenario has reached an H factor of 1.2–1.3 at βN of 3 for 2–3 s; and, (iv) in comparison to carbon equivalent discharges, total radiation is similar but the edge radiation is lower and Zeff of the order of 1.3–1.4. Strong core radiation peaking is observed in H-mode discharges at a low gas fuelling rate (i.e. below 0.5 × 1022 D s−1) and low ELM frequency (typically less than 10 Hz), even when the tungsten influx from the diverter is constant. High-Z impurity transport from the plasma edge to the core appears to be the dominant factor to explain these observations. This paper reviews the major physics and operational achievements and challenges that an ITER-like wall configuration has to face to produce stable plasma scenarios with maximized performance. 000172837 536__ $$0G:(DE-HGF)POF2-135$$a135 - Plasma-wall interactions (POF2-135)$$cPOF2-135$$fPOF II$$x0 000172837 588__ $$aDataset connected to CrossRef, juser.fz-juelich.de 000172837 7001_ $$0P:(DE-HGF)0$$aBaruzzo, M.$$b1 000172837 7001_ $$0P:(DE-HGF)0$$aBeurskens, M.$$b2 000172837 7001_ $$0P:(DE-HGF)0$$aBourdelle, C.$$b3 000172837 7001_ $$0P:(DE-Juel1)129976$$aBrezinsek, S.$$b4$$ufzj 000172837 7001_ $$0P:(DE-HGF)0$$aBucalossi, J.$$b5 000172837 7001_ $$0P:(DE-HGF)0$$aBuratti, P.$$b6 000172837 7001_ $$0P:(DE-HGF)0$$aCalabro, G.$$b7 000172837 7001_ $$0P:(DE-HGF)0$$aChallis, C. 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