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@TECHREPORT{Unterberg:136118,
author = {Unterberg, Bernhard and Institut für Plasmaphysik
(Jülich) and Association EURATOM - Forschungszentrum
Jülich and Universität (Bochum)},
title = {{S}trahlungskühlung durch {V}erunreinigungen in der
{P}lasmarandschicht des {T}okamaks {TEXTOR} - vergleichende
{U}ntersuchungen zur {I}njektion von {N}eon und {S}ilizium},
volume = {3036},
number = {Juel-3036},
address = {Jülich},
publisher = {Forschungszentrum},
reportid = {PreJuSER-136118, Juel-3036},
series = {Berichte des Forschungszentrums Jülich},
pages = {120 S.},
year = {1995},
note = {Record converted from JUWEL: 18.07.2013},
abstract = {The concept of a cold radiating plasma mantle might help to
solve the problem of energy exhaust in a fusion reactor.
Line radiation of impurities localized at the boundary of
the bulk plasma could distribute the heating power onto the
whole vessel wall and avoid dangerous heat loads at the
plasma facing components as limiters or divertor plates.
Important requirements have to be fulfilled within such a
concept: on the one hand a stationary impurity concentration
at the edge on a high level, sufficient to radiate a
substantial fraction of the heating power and to reduce the
plasma temperature at the boundary and the convective heat
flow to the limiters or divertor plates, but on the other
hand a limitation of the central impurity concentration to
values compatible with ignition in a fusion reactor at the
same time. First experiments at the tokamak TEXTOR with neon
as the radiating impurity gave evidence for the feasibility
of this concept. Within this work further experiments with
neon and a comparison with silicon as the radiating impurity
have been performed. The results are discussed with the help
of model calculations to judge these two elements with
respect to their suitability for radiation cooling by
characterizing the mechanisms of their plasma wall
interaction and the properties of radiation and transport},
cin = {IEF-4},
cid = {I:(DE-Juel1)VDB812},
shelfmark = {PGN - Fusion technology, plasma devices},
typ = {PUB:(DE-HGF)29},
url = {https://juser.fz-juelich.de/record/136118},
}