Results 221 to 230 of about 1,646 (256)

Divertor for W7-X: II. Comparison of island and axisymmetric divertor

Plasma Physics and Controlled Fusion, 2002
The need for sufficient power and particle exhaust is common to all magnetic confinement concepts. For the new stellarator W7-X, making use of the intrinsic island structure at the edge, an island divertor is planned. The concept of the W7-X island divertor (as a prototype of general island divertors) and its specific design criteria will be presented.
Schneider, R., Renner, H., Bonnin, X., Coster, D., Neuhauser, J.   +4 more
openaire   +2 more sources

The poloidal divertor field amplifiers for the JET pump divertor

Proceedings of 16th International Symposium on Fusion Engineering, 2002
Four new amplifiers have been procured to feed the new divertor field coils of JET. They have been operated successfully since the beginning of 94. The paper presents their main characteristics and the operational experience acquired during experimental campaigns.
D. Chiron, N. Dolgetta, M. Garribba, M. Huart, L.V. Lieshout, P. Noll, B. Sjouw, F. Zannelli   +7 more
openaire   +1 more source

Partially detached radiative divertor with active divertor pumping

Nuclear Fusion, 1997
Deuterium fuelled radiative diverters, operating in the partially detached divertor (PDD) regime, are effective in reducing the heat load on the divertor target. These PDD discharges are shown to be compatible with active particle exhaust conditions-an important issue for ITER type operation.
T.W Petrie, R Maingi, S.L Allen, D.A Buchenauer, D.N Hill, C.J Lasnier   +5 more
openaire   +1 more source

Divertor Concepts II: The Dynamic Ergodic Divertor

Fusion Science and Technology, 2004
The Dynamic Ergodic Divertor (DED) has recently been taken into operation on the TEXTOR tokamak. One of the aims is the study of the mitigation of the heat flux by rotating the divertor strike points. After an introduction into the theory of ergodization, the design of the DED is presented.
openaire   +1 more source

Results from the DITE bundle divertor with fuelling in the divertor

Journal of Nuclear Materials, 1984
The DITE bundle divertor MkII has been operated with high power neutral beam injection, up to 2.1 MW, and with gaseous fuelling in the divertor. Discharges with good confinement have been used to study the properties of the plasma exhaust channel in the presence of a high density of neutral molecules in the divertor, up to ~ 1 ×1021 m−3. An inner layer
P.J. Harbour, P.C. Johnson, G. Proudfoot, J. Allen, K.B. Axon, D.N. Edwards, S.K. Erents, S.J. Fielding, D.H.J. Goodall, D. Guilhem, D. Heifetz, J. Hugill, G. Matthews, J.G. Morgan, G.M. McCracken   +14 more
openaire   +1 more source

A Slot Divertor for Tokamaks with High Divertor Heat Loads

Fusion Technology, 1990
AbstractA new divertor configuration is suggested as a possible solution to the problems of high heat flux and erosion at the divertors in large high-power tokamaks. The proposed configuration is a toroidally symmetrical slot in the divertor that allows part of the edge plasma and most of its power to enter a cavity in a thin annular sheet.
William L. Barr, B. Grant Logan
openaire   +1 more source

The ITER divertor

15th IEEE/NPSS Symposium. Fusion Engineering, 2002
The ITER divertor design is based on the high density exhaust concept of reducing peak heat fluxes falling on the divertor plates. The power is transferred from the edge plasma to the walls of the divertor chamber by atomic and molecular processes such as radiation, charge exchange, recombination, and gas conduction before it can reach tile divertor ...
K.J. Dietz, P.-H. Rebut
openaire   +2 more sources

Kinetic Divertor Modeling [PDF]

, 2011
The coupled dynamics and kinetics between gas and plasma in the divertor region is studied by means of a one-dimensional Particle in Cell-Direct Simulation Monte Carlo (PIC-DSMC) model. In particular, the collision-induced vibrational excitation/relaxation of H2 molecules and particle-surface interaction (vibrational relaxation and recombinative ...
Taccogna F, Minelli P, Bruno D
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Plasma recombination and molecular effects in tokamak divertors and divertor simulators

Physics of Plasmas, 1997
Analysis of the experimental data from tokamaks and linear divertor simulators leads to the conclusion that plasma recombination is a crucial element of plasma detachment. Different mechanisms of plasma recombination relevant to the experimental conditions of the tokamak scrape-off layer (SOL) and divertor simulators are considered.
S. I. Krasheninnikov, A. Yu. Pigarov, D. A. Knoll, B. LaBombard, B. Lipschultz, D. J. Sigmar, T. K. Soboleva, J. L. Terry, F. Wising   +8 more
openaire   +1 more source

Optimal shape design for divertors

International Journal of Computational Science and Engineering, 2014
Owing to the complex physics of the plasma edge, numerical simulation tools are indispensable for the evaluation of novel divertor concepts. Simulation-based divertor design is computationally extremely expensive, however, not in the least due to the large number of design variables.
Wouter Dekeyser, Detlev Reiter, Martine Baelmans   +2 more
openaire   +1 more source