Results 21 to 30 of about 131,113 (167)

Experimental characterization of the edge fluctuations during I-phase at ASDEX Upgrade

Nuclear Fusion
The intermediate phase (I-phase) is a plasma regime that exists at the transition from the low-confinement mode (L-mode) to the fully developed high-confinement mode (H-mode), or vice versa.
J. Kalis, G. Birkenmeier, M. Griener, G. Grenfell, E. Wolfrum, M. Willensdorfer, J. Adamek, U. Stroth, the ASDEX Upgrade Team   +8 more
doaj   +1 more source

Edge plasma measurements on the OP 1.2a divertor plasmas at W7-X using the combined probe

Nuclear Materials and Energy, 2019
During its second operational campaign (OP 1.2a) W7-X operated with an edge island divertor. Much higher densities (1020m−3) than in to the previous, limiter campaign were achieved.
P. Drews, C. Killer, J. Cosfeld, A. Knieps, S. Brezinsek, M. Jakubowski, C. Brandt, S. Bozhenkov, A. Dinklage, J. Cai, M. Endler, K. Hammond, M. Henkel, Y. Gao, J. Geiger, O. Grulke, D. Höschen, R. König, A. Krämer-Flecken, Y. Liang, Y. Li, S. Liu, H. Niemann, D. Nicolai, O. Neubauer, U. Neuner, M. Rack, K. Rahbarnia, L. Rudischhauser, N. Sandri, G. Satheeswaran, S. Schilling, H. Thomsen, T. Windisch, S. Sereda   +34 more
doaj   +1 more source

The quasi-continuous exhaust regime in JET

Nuclear Fusion
The quasi-continuous exhaust (QCE) regime is a regime that is naturally type-I ELM-free. It combines the high density at the plasma edge needed for power exhaust with the high normalised energy confinement typical for H-mode operation.
M. Faitsch, M. Dunne, E. Lerche, P. Lomas, I. Balboa, P. Bilkova, P. Bohm, A. Kappatou, D. Kos, B. Labit, S. Menmuir, O. Sauter, S. Silburn, E.R. Solano, H.J. Sun, A. Tookey, E. Viezzer, U. Stroth, JET Contributors, the EUROfusion Tokamak Exploitation Team   +19 more
doaj   +1 more source

Plasma edge modelling with ICRF coupling

EPJ Web of Conferences, 2017
The physics of Radio-Frequency (RF) wave heating in the Ion Cyclotron Range of Frequencies (ICRF) in the core plasmas of fusion devices are relatively well understood while those in the Scrape-Off Layer (SOL) remain still unresolved.
Zhang Wei, Coster David, Feng Yuhe, Lunt Tilmann, Aguiam Diogo, Bilato Roberto, Bobkov Volodymyr, Jacquot Jonathan, Jacquet Philippe, Lerche Ernesto, Noterdaeme Jean-Marie, Tierens Wouter   +11 more
doaj   +1 more source

Comparison of divertor seed impurity gases retention efficiency by SOLPS-ITER modeling

Nuclear Fusion
In the paper a SOLPS-ITER modeling of H-Mode scenarios with different seed impurity gases (N, Ne, Ar, Kr) is performed for ASDEX Upgrade geometry. These gases are compared from the point of view of their radiation efficiency and compression in the ...
I.Yu. Senichenkov, A.G. Poletaeva, E.G. Kaveeva, I.Yu. Veselova, A.R. Nichik, V.A. Rozhansky   +5 more
doaj   +1 more source

Numerical investigation on lithium transport in the edge plasma of EAST real-time- Li-injection experiments in the frame of BOUT++

Nuclear Materials and Energy, 2017
To study the transport of Li species in the plasma with real-time Li aerosol injection on EAST, a model has been developed by reducing Braginskii's equations, and implemented in the frame of BOUT++.
N.M. Li, J.Z. Sun, Z.H. Wang, X.Q. Xu, Z. Sun, L. Wang, J.S. Hu, D.Z. Wang   +7 more
doaj   +1 more source

Influence of the Active Screen on the Embrittlement of a Plasma-Nitrided Edge [PDF]

Materials Research
In plasma nitriding of cutting tools, edge embrittlement can result from both, deepest layer, and grain boundaries precipitation. Overheating and surface charge density concentration in Direct Current Plasma Nitrided (DCPN) can be reduced through an ...
Júlio Azambuja da Silveira, Julio Cesar Klein das Neves, Leonardo Fonseca de Oliveira, Alexandre da Silva Rocha   +3 more
doaj   +1 more source

Edge radial electric field in positive and negative triangularity plasmas in the TCV tokamak

Nuclear Fusion
We present the first edge E _r measurements in negative triangularity (NT) plasmas in the Tokamak à Configuration Variable (TCV). The Doppler backscattering measurements of $v_\perp \approx E_r/B$ reveal a significant impact of triangularity on the E _r ...
S. Rienäcker, P. Hennequin, L. Vermare, C. Honoré, R. Bouffet-Klein, S. Coda, B. Labit, B. Vincent, K.E. Thome, O. Krutkin, A. Balestri, Y. Nakeva, the TCV Team   +12 more
doaj   +1 more source

Theory of edge plasma in a spheromak [PDF]

Journal of Nuclear Materials, 2000
Abstract Properties of the edge plasma in the SSPX spheromak during the plasma formation and sustainment phases are discussed. For the breakdown and formation phase, the main emphasis is on the analysis of possible plasma contamination by impurities from the electrodes of the plasma gun (helicity injector).
E.B Hooper, R.H Cohen, D.D Ryutov
openaire   +1 more source

Doubling fusion power with volumetric optimization in magnetic confinement fusion devices

Physical Review Research
A technique, volumetric power optimization, is presented for enhancing the power output of magnetic confinement fusion devices. Applied to a tokamak, this approach involves shifting the burning plasma region to a larger plasma volume while introducing ...
J. F. Parisi, J. W. Berkery, A. Sladkomedova, S. Guizzo, M. R. Hardman, J. R. Ball, A. O. Nelson, S. M. Kaye, M. Anastopoulos-Tzanis, S. A. M. McNamara, J. Dominski, S. Janhunen, M. Romanelli, D. Dickinson, A. Diallo, A. Dnestrovskii, W. Guttenfelder, C. Hansen, O. Myatra, H. R. Wilson   +19 more
doaj   +1 more source