H. Kollotzek

TL;DR: Feedback-controlled puffing of neon and deuterium has been applied to control the edge-localized-mode behavior and the target plate power deposition during high-power H -mode discharges in ASDEX Upgrade.

TL;DR: In this paper, a modified divertor configuration for ASDEX upgrade, allowing operation at higher triangularity, and with a changed neutral beam injection (NBI) system, for a more tangential, off-axis beam deposition.

TL;DR: In this article, it was found that the large He content in the plasma, resulting from DC glow discharges for conditioning, leads to a confinement reduction and after the change to D glow for inter-shot conditioning, the He content quickly dropped and, in parallel, the usual H-mode confinement with H factors close to one was achieved.

TL;DR: In this article, it was found that the large He content in the plasma, resulting from DC glow discharges for conditioning, leads to a confinement reduction and after the change to D glow for inter-shot conditioning, the He content quickly dropped and, in parallel, the usual H-mode confinement with H factors close to one was achieved.

TL;DR: In this paper, the authors studied the power-decay length of the divertor tokamak ASDEX upgrade and showed that the drift-wave dynamics in the inner divertor and the outer divertor can be modelled by a gyro-fluid code and point to the dominance of drift waves.