Results 211 to 220 of about 447 (244)

Divertor Plasma Detachment: Present Status of Understanding

Contributions to Plasma Physics, 1996
AbstractWe consider the main features of plasma detachment and try to find the most natural way to explain them. In general, we focus more on the qualitative analysis of the problem, illustrating the physics of the processes, rather than discussions of particular solutions of the plasma transport equations.
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Plasma detachment from divertor targets and limiters

Journal of Nuclear Materials, 1995
Abstract Plasma detachment from a divertor target is defined as the state in which large gradients in total plasma pressure (static plus dynamic) are observed parallel to the magnetic field with consequent reductions in the plasma power and ion fluxes to the limiting surfaces. The origins of this concept and the first experiments in a linear divertor
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Influence of Plasma Composition on Divertor Detachment

Contributions to Plasma Physics, 2000
The phenomena that lead to the observed power and particle flux detachment have been studied with the code B2-Eirene for DIII-D Helium and Deuterium experiments. Contrary to the usual Deuterium experiments, a significant reduction of the power load to the divertor is observed in Helium discharges while the ion flux remains high.
Loarte, A., Kukushkin, A., Porter, G., Hill, D., Watkins, J., Reiter, D., Coster, D., Schneider, R.   +7 more
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Access conditions for H modes with detached divertor plasmas

Nuclear Fusion, 1996
Access conditions for H modes with detached divertor plasmas are derived by considering power threshold, divertor plasma temperature and density limit constraints. It is found that there is a minimum scrape-off layer power and main plasma density for accessing the detached divertor H mode, and that the required divertor radiated power fraction must ...
Borrass, K., Farengo, R., Vlases, G.
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Detachment and divertor temperature and density redistribution

Physics of Plasmas, 2001
A theoretical model is developed for large scale-length, one-dimensional thermal instabilities along the field lines in tokamak divertors. Calculated growth rates predict a divertor thermal instability under the conditions (low-plasma temperature and density and high-neutral densities at the divertor plate) at which detachment followed by large-scale ...
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Volume recombination and detachment in JET divertor plasmas

Journal of Nuclear Materials, 1999
The spatial distribution of recombination has been studied in the detaching phases of L and H-mode discharges. Recombination is detected by the sudden increase in intensity of the high quantum number states of the Balmer series of hydrogen. In L-mode, detachment occurs completely and the radiation moves to a region near the X-point.
R.D. Monk, A. Meigs, L. Horton, L.C. Ingesson, J. Lingertat, G.F. Matthews, M.G. O'Mullane, R. Prentice, M.F. Stamp, G.M. McCracken, P.C. Stangeby   +10 more
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Characterization of a partially-ionized, detached, divertor plasma

Physics of Plasmas, 1996
A combined edge plasma/Navier–Stokes neutral transport model is used to characterize divertor plasma detachment, in the collisional limit for neutrals, on a simplified two-dimensional slab geometry with Alcator-C-MOD-like plasma conditions [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)]. The neutral model contains three momentum equations which
D. A. Knoll, S. I. Krasheninnikov, P. R. McHugh, D. J. Sigmar   +3 more
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Detachment in alternative divertor geometries on TCV

2017
The dependence of divertor detachment on magnetic geometry is explored on the TCV tokamak, with the goal of improving our basic understanding of this process and optimizing the divertor geometry for a power plant. In the experiments, connection length from the midplane to the outer target is varied by up to a factor two by either modifying the poloidal
Theiler C., Duval B., Février O., Harrison J., Innocente P., Labit B., Lipschultz B., Maurizio R., Reimerdes H., Sheikh U., Tsui C., Verhaegh K., Vijvers W.A.J., TCV team, EUROfusion MST1 team   +14 more
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Divertor of the European DEMO: Engineering and technologies for power exhaust

Fusion Engineering and Design, 2022
Mike Fursdon, Christian Bachmann, Thomas Barrett   +2 more
exaly  

Divertor detachment during pure helium plasmas in JET

2003
A campaign of pure helium discharges in the JET tokamak equipped with the MarkIIGB divertor has been performed. This paper describes some of the experimental observations of divertor detachment obtained in L-mode density ramp He discharges and presents a selection of results from the application of B2.5-Eirene code modelling to a JET He plasma ...
Wischmeier, M., Coster, D. ; https://orcid.org/0000-0002-2470-9706, Bonnin, X., Eich, T. ; https://orcid.org/0000-0003-3065-8420, Huber, A., Ingesson, C., Jachmich, S., Kukushkin, A., Loarte, A., Matthews, G., Pitts, R., Rapp, J., Reiter, D., Tsitrone, E.   +13 more
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