英国物理学会
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作者:A. Herrmann , D. Ripamonti ...
来源:[J].Nuclear Fusion(IF 2.734), 2018, Vol.58 (10)
摘要:Castellated substrates with adhered micron dust have been exposed in the outer ASDEX-Upgrade divertor to ELMy H-mode discharges. Beryllium proxy (chromium, copper) and refractory metal (tungsten, molybdenum) dust has been deposited on the plasma-facing and plasma-shadowed si...
作者:A. Herrmann , A. Kirk ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (6)
摘要:Divertor heat load is a major concern for large scale fusion devices such as ITER. Both steady state heat exhaust as well as heat loads due to transient events such as type-I ELMs need to be understood in order to predict the thermal load onto the divertor targets. The use of ext...
作者:A. Herrmann , P. de Marne ...
来源:[J].Nuclear Fusion(IF 2.734), 2018, Vol.58 (2)
摘要:Repetitive melting of tungsten by power transients originating from edge localized modes (ELMs) has been studied in ASDEX Upgrade. Tungsten samples were exposed to H-mode discharges at the outer divertor target plate using the divertor manipulator II (DIM-II) system (Herrman...
作者:A. Herrmann , H. Greuner ...
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (6)
摘要:ASDEX Upgrade became a full tungsten experiment in 2007 by coating its graphite plasma facing components with tungsten. In 2013 a redesigned solid tungsten divertor, Div-III, was installed and came into operation in 2014. The redesign of the outer divertor geometry provided ...
作者:A. Herrmann , R. Dux ...
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (3)
摘要:Experiments of disruption mitigation with massive gas injection are conducted in ASDEX Upgrade with fast valves located close to the plasma. The valves and the dedicated experiment are described in this paper. The dependence of the fuelling efficiency on plasma and gas parameters...
作者:A. Herrmann , M. Maraschek ...
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (5)
摘要:Detachment of high power discharges is obtained in ASDEX Upgrade by simultaneous feedback control of core radiation and divertor radiation or thermoelectric currents by the injection of radiating impurities. So far 2/3 of the ITER normalized heat flux P sep/ R = 1...
作者:A. Herrmann , H. Faugel ...
来源:[J].Nuclear Fusion(IF 2.734), 2016, Vol.56 (8)
摘要:The 3-strap antennas in ASDEX Upgrade allow ICRF operation with low tungsten (W) content in the confined plasma with W-coated antenna limiters. With the 3-strap antenna configuration, the local W impurity source at the antenna is drastically reduced and the core W concentration i...
作者:A. Herrmann , L.D. Horton ...
来源:[J].Nuclear Fusion(IF 2.734), 2008, Vol.48 (4)
摘要:In order to assess the contribution of edge localized modes (ELMs) to plasma–wall interaction in future fusion experiments like ITER, a sound experimental database for model validation and extrapolation, and, to be prepared for the unfavourable case, the development of tools...
作者:A. Herrmann , H.W. Müller ...
来源:[J].Nuclear Fusion(IF 2.734), 2008, Vol.48 (8)
摘要:Particle, electric charge and power fluxes for type-I ELMy H-modes are measured in the divertor of the ASDEX Upgrade tokamak by triple Langmuir probes, shunts, infrared (IR) thermography and spectroscopy. The discharges are in the medium to high density range, resulting in predom...
作者:A. Herrmann , L.D. Horton ...
来源:[J].Nuclear Fusion(IF 2.734), 2008, Vol.49 (1)
摘要:SOLPS simulation of a dedicated ASDEX Upgrade Ohmic shot for scrape-off layer and divertor modelling is described. The tendency of the code to predict a colder and denser divertor plasma compared with the experiment for solutions that satisfy main boundary conditions (on the inpu...

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