Results 121 to 130 of about 131,113 (167)

Self-similarity of the plasma edge fluctuations

Physics of Plasmas, 1998
The rescaled range analysis techniques are used to investigate long-range dependence in plasma edge fluctuations [Mandelbrot and Wallis, Water Resources Res. 4, 909 (1969)]. This technology has been applied to data from several confinement devices such as tokamaks, stellarators, and reversed-field pinch. The results reveal the self-similar character of
Carreras, BA, van Milligen,B. Ph, Pedrosa, M. A., Balbin,R., Hidalgo,C., Newman,D. E., Sanchez,E., Frances,M., Garcia-Cortes,I., Bleuel,V, Endler,M., Riccardi,C., Davies,S., Matthews,G. F., Martines, E, Antoni,A., Latten,A., Klinger,T   +17 more
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On Electrostatic Coupling in ICRH at the Plasma Edge

Contributions to Plasma Physics, 1992
AbstractThe mechanisms leading to a concomitant coupling of electrostatic (ES) waves in ion cyclotron range fast wave heating experiments are studied. Mode conversion at the lower hybrid resonance and direct coupling to ES waves due to the misalignment of the antenna Faraday shields are considered as sources of intense ES waves in the edge plasma.
Alava, Mikko, Heikkinen, Jukka
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Flows in the TEXTOR SOL and edge plasma

Journal of Nuclear Materials, 1992
Poloidal asymmetries in the electron density profiles and limiter diagnostics suggest that poloidal and toroidal flows exist in the SOL and edge plasma of the TEXTOR tokamak. A fast reciprocating probe located at the outer midplane provides profiles of the basic plasma parameters including radial electric field and fluctuation driven transport.
Boedo, J., Gray, D. S., Tynan, G. R., Pitts, R., Dippel, K. H., Finken, K. H., Conn, R.   +6 more
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Characterization of Intermittency in Plasma Edge Turbulence

Contributions to Plasma Physics, 2008
AbstractThe intermittency in the edge turbulence of the magnetic confinement devices, caused by large‐scale events with high radial velocity, has been the object of several recent studies. It is well known that bursty behavior in the scrape‐off layer of magnetically confined plasmas, and the departure from random diffusion models is caused by ...
Škorić, Miloš M., Rajković, Milan
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Recurrence in plasma edge turbulence

Physics of Plasmas, 2001
Common statistics of turbulent electrostatic fluctuations observed at the plasma edge and scrape-off layer are analyzed in three tokamak devices that have different configurations. The statistics of experimental data collected using fixed sampling time is the same than the statistics of the time for which the oscillation return to a specified reference
M. S. Baptista, I. L. Caldas, M. V. A. P. Heller, A. A. Ferreira, R. D. Bengtson, J. Stöckel   +5 more
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Kinetic effects in edge plasma: kinetic modeling for edge plasma and detached divertor

Plasma Physics and Controlled Fusion, 2017
Detached divertor is considered a solution for the heat control in magnetic-confinement fusion reactors. Numerical simulations using the comprehensive divertor codes based on the plasma fluid modeling are indispensable for the design of the detached divertor in future reactors.
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Plasma edge research on TEXTOR

Plasma Physics and Controlled Fusion, 1987
The relations between plasma wall interaction and plasma core properties are studied by spectroscopic methods applied to the emission of neutral particles at the plasma boundary. The interdependence between the structure of the scrape-off layer (SOL), particle-fluxes and impurity release are analyzed. In particular, the importance of molecule formation
U Samm, H L Bay, P Bogen, H Hartwig, E Hintz, K Höthker, Y T Lie, A Pospieszczyk, G G Ross, D Rusbüldt, B Schweer   +10 more
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Edge transport in fusion plasmas

Plasma Physics and Controlled Fusion, 2007
It has long been recognized that the plasma edge and the interaction of the plasma with material interfaces through the scrape-off layer (SOL) is crucial for the successful operation of future fusion machines, e.g. ITER. Tremendous progress has been achieved in the last decade in diagnosing, modelling and understanding this plasma region.
V Naulin, W Fundamenski, R Zagorski
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Bifurcation of Temperature in Edge Plasmas

Contributions to Plasma Physics, 2000
Multiple solutions and bifurcation phenomena of the 1d heat conduction equation are caused by the non-monotonic dependence of the impurity radiation function on the temperature [1], [2], or nonlinear boundary conditions for the heat flux to the target plates in the high-recycling regime [3].
Bachmann, P., Sünder, D., Wobig, H.
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Marfe: an edge plasma phenomenon

Nuclear Fusion, 1984
A tokamak edge phenomenon, dubbed the 'marfe' (for multifaceted asymmetric radiation from the edge), is described. This phenomenon, observed in medium- to high-density Alcator C discharges, is characterized by greatly increased radiation, density and density fluctuations, and decreased temperature in a relatively small volume at the inner major radius ...
B. Lipschultz, B. LaBombard, E.S. Marmar, M.M. Pickrell, J.L. Terry, R. Watterson, S.M. Wolfe   +6 more
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