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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
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000172837 520__ $$aIn the recent JET experimental campaigns with the new ITER-like wall (JET-ILW), major progress has been achieved in the characterization and operation of the H-mode regime in metallic environments: (i) plasma breakdown has been achieved at the first attempt and X-point L-mode operation recovered in a few days of operation; (ii) stationary and stable type-I ELMy H-modes with βN ~ 1.4 have been achieved in low and high triangularity ITER-like shape plasmas and are showing that their operational domain at H = 1 is significantly reduced with the JET-ILW mainly because of the need to inject a large amount of gas (above 1022 D s−1) to control core radiation; (iii) in contrast, the hybrid H-mode scenario has reached an H factor of 1.2–1.3 at βN of 3 for 2–3 s; and, (iv) in comparison to carbon equivalent discharges, total radiation is similar but the edge radiation is lower and Zeff of the order of 1.3–1.4. Strong core radiation peaking is observed in H-mode discharges at a low gas fuelling rate (i.e. below 0.5 × 1022 D s−1) and low ELM frequency (typically less than 10 Hz), even when the tungsten influx from the diverter is constant. High-Z impurity transport from the plasma edge to the core appears to be the dominant factor to explain these observations. This paper reviews the major physics and operational achievements and challenges that an ITER-like wall configuration has to face to produce stable plasma scenarios with maximized performance.
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000172837 7001_ $$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$$aChallis, C. D.$$b8
000172837 7001_ $$0P:(DE-Juel1)6806$$aClever, M.$$b9
000172837 7001_ $$0P:(DE-Juel1)2594$$aCoenen, J.$$b10$$ufzj
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000172837 7001_ $$0P:(DE-HGF)0$$aLomas, P.$$b13
000172837 7001_ $$0P:(DE-HGF)0$$ade la Luna, E.$$b14
000172837 7001_ $$0P:(DE-HGF)0$$ade Vries, P.$$b15
000172837 7001_ $$0P:(DE-HGF)0$$aFlanagan, J.$$b16
000172837 7001_ $$0P:(DE-HGF)0$$aFrassinetti, L.$$b17
000172837 7001_ $$0P:(DE-HGF)0$$aFrigione, D.$$b18
000172837 7001_ $$0P:(DE-HGF)0$$aGiroud, C.$$b19
000172837 7001_ $$0P:(DE-HGF)0$$aGroth, M.$$b20
000172837 7001_ $$0P:(DE-HGF)0$$aHawkes, N.$$b21
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000172837 7001_ $$0P:(DE-Juel1)130087$$aLehnen, M.$$b23
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000172837 7001_ $$0P:(DE-HGF)0$$aMailloux, J.$$b25
000172837 7001_ $$0P:(DE-HGF)0$$aMaggi, C. F.$$b26
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000172837 7001_ $$0P:(DE-HGF)0$$aSertoli, M.$$b34
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000172837 7001_ $$0P:(DE-HGF)0$$aSips, A. C. C.$$b36
000172837 7001_ $$0P:(DE-HGF)0$$avan Rooij, G.$$b37
000172837 7001_ $$0P:(DE-HGF)0$$aVoitsekhovitch, I.$$b38
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