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000836781 1001_ $$0P:(DE-HGF)0$$aKallenbach, A.$$b0$$eCorresponding author
000836781 245__ $$aOverview of ASDEX Upgrade results
000836781 260__ $$aVienna$$bIAEA$$c2017
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000836781 520__ $$aThe ASDEX Upgrade (AUG) programme is directed towards physics input to critical elements of the ITER design and the preparation of ITER operation, as well as addressing physics issues for a future DEMO design. Since 2015, AUG is equipped with a new pair of 3-strap ICRF antennas, which were designed for a reduction of tungsten release during ICRF operation. As predicted, a factor two reduction on the ICRF-induced W plasma content could be achieved by the reduction of the sheath voltage at the antenna limiters via the compensation of the image currents of the central and side straps in the antenna frame. There are two main operational scenario lines in AUG. Experiments with low collisionality, which comprise current drive, ELM mitigation/suppression and fast ion physics, are mainly done with freshly boronized walls to reduce the tungsten influx at these high edge temperature conditions. Full ELM suppression and non-inductive operation up to a plasma current of ${{I}_{\text{p}}}=0.8$ MA could be obtained at low plasma density. Plasma exhaust is studied under conditions of high neutral divertor pressure and separatrix electron density, where a fresh boronization is not required. Substantial progress could be achieved for the understanding of the confinement degradation by strong D puffing and the improvement with nitrogen or carbon seeding. Inward/outward shifts of the electron density profile relative to the temperature profile effect the edge stability via the pressure profile changes and lead to improved/decreased pedestal performance. Seeding and D gas puffing are found to effect the core fueling via changes in a region of high density on the high field side (HFSHD).
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000836781 7001_ $$0P:(DE-Juel1)2594$$aCoenen, Jan Willem$$b1
000836781 7001_ $$0P:(DE-HGF)0$$aASDEX Upgrade Team, $$b2
000836781 7001_ $$0P:(DE-HGF)0$$aEUROfusion MST1 Team, $$b3
000836781 773__ $$0PERI:(DE-600)2037980-8$$a10.1088/1741-4326/aa64f6$$gVol. 57, no. 10, p. 102015 -$$n10$$p102015 -$$tNuclear fusion$$v57$$x1741-4326$$y2017
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