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H-Mode Threshold and Confinement in Helium, Deuterium and Hydrogen in ASDEX Upgrade
BibTeX
@MISC{Ryter_h-modethreshold,
author = {F. Ryter and M. Reich and A. Scarabosio and E. Wolfrum and R. Fischer and M. Gemisic Adamov and N. Hicks and B. Kurzan and C. Maggi and R. Neu and V. Rohde and G. Tardini and Asdex Upgrade Team},
title = {H-Mode Threshold and Confinement in Helium, Deuterium and Hydrogen in ASDEX Upgrade},
year = {}
}
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Abstract
In 2008, experiments have been carried out in ASDEX Upgrade to compare H-mode power threshold, L-to-H transition and confinement time in helium and deuterium. For the power threshold, a scan in magnetic field and a wide density variation have been performed in the two gases. The threshold power for the two gases is very similar, as well as the dependencies upon magnetic field and density. For confinement, density and heating power scans confirm previous results. The confinement time in helium is about 35 % lower than in deuterium due to the reduction of the ion density caused by Z=2 in helium. 1.
