Results 251 to 260 of about 140,360 (284)

Slow Thermal Waves in Impurity Seeded Radiative Plasmas

Physical Review Letters, 1996
Linear and nonlinear wave propagation in optically thin, impurity seeded radiative plasmas is studied in slab geometry. Taking into account the thermal force that acts on impurity ions leads to a new type of slightly damped or slightly unstable subsonic waves that propagate within limited ranges of temperature.
, Morozov, , Herrera
openaire   +2 more sources

Modelling of DEMO core plasma consistent with SOL/divertor simulations for long-pulse scenarios with impurity seeding

Nuclear Fusion, 2007
The integrated core-pedestal-SOL model is applied to the simulation of a typical DEMO operation. Impurity seeding is used to reduce the power load on the divertor to acceptable levels.
Pacher, G. W., Reiter, D., Kukushkin, A. S., Pacher, H. D., Janeschitz, G., Kotov, V.   +5 more
exaly   +2 more sources

Influence of seeded impurities on the fusion reactor operation

Czechoslovak Journal of Physics, 2004
In order to study the influence of seeded impurities on ITER like reactor operation the COREDIV code has been extended to include the transport of several sputtered and/or injected impurities. In the COREDIV code the core plasma is treated in the frame of 1D radial transport model whereas in the edge the 2D multifluid code EPIT is used.
R. Stankiewicz, R. Zagórski
openaire   +1 more source

Radiated power distributions in impurity-seeded plasmas in LHD

Journal of Nuclear Materials, 2015
Abstract In LHD, impurity seeding has been performed to enhance the radiative cooling in the edge region. Neon, nitrogen and argon were seeded by gas puffing, and the behaviour of those impurities in the plasma was investigated with the innovative diagnostic method.
T. Morisaki, K. Oyama, N. Tamura, S. Masuzaki, T. Akiyama, G. Motojima, J. Miyazawa, B.J. Peterson, N. Ohno, H. Yamada   +9 more
openaire   +1 more source

Impurity-seeded plasma experiments on JET

2003
Scaling to larger tokamaks of high confinement plasmas with radiating edges, induced by impurities, is being studied through internationally collaborative experiments on JET. In campaigns till the end of 2000, three different regimes have been explored. A small number of limiter L-mode discharges seeded with neon have most closely repeated the approach
Maddison, G.P., von Hellermann, M., et al.,, Ingesson, L.C.   +3 more
openaire   +2 more sources

Reduced Models of Impurity Seeded Edge Plasmas

Contributions to Plasma Physics, 2008
AbstractThe reduced descriptions of the distribution of impurities over ionization states, radiation losses and plasma dynamics are reviewed. Two and three most important ion approximation for light impurities and continuous descriptions of heavy impurities are discussed. Reduced descriptions of atomic processes like ionization, photo‐ and dielectronic
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Impurity Seeding with Dust Injection in Tokamak Edge Plasmas

Contributions to Plasma Physics, 2012
AbstractImpurity seeding of tokamak edge plasmas in the form of dust is modeled using the recently coupled DUSTT/UEDGE code. The effects on edge plasma performance due to lithium and carbon dust continuously injected at different poloidal locations in NSTX and ITER are modeled.
R.D. Smirnov, S.I. Krasheninnikov, A.Yu. Pigarov, T.D. Rognlien, D.K. Mansfield, C.H. Skinner, A.L. Roquemore   +6 more
openaire   +1 more source

Influence of impurity seeding on plasma burning scenarios for ITER

Fusion Engineering and Design, 2016
Abstract ITER expects to produce fusion power of about 0.5GW when operating with tungsten (W) divertor and beryllium (Be) wall. The influx of W from divertor can have significant influence on the discharge performance. This work describes predictive integrated numerical modeling of ITER discharges using the COREDIV code, which self-consistently ...
Ivanova-Stanik, I., Zagórski, R., Voitsekhovitch, I., Brezinsek, S.   +3 more
openaire   +1 more source

Impurity seeded radiative power exhaust solutions for ITER

Nuclear Fusion, 1996
The injection of impurities into the scrape-off layer (SOL) to stimulate radiative power exhaust from the mantle and SOL/divertor of the International Thermonuclear Experimental Reactor (ITER) is investigated. Intermediate Z impurities (e.g. argon to krypton) are able to radiate more than two thirds of the plasma heating power, without significant ...
J Mandrekas, W.M Stacey, F Kelly
openaire   +1 more source

Influence of impurity seeding on the plasma radiation in the EAST tokamak

Plasma Science and Technology, 2018
Plasma radiation characteristics in EAST argon (Ar) gas and neon (Ne) gas seeding experiments are studied. The radiation profiles reconstructed from the fast bolometer measurement data by tomography method are compared with the ones got from the simulation program based on corona model.
Liping DONG, Yanmin DUAN, Kaiyun CHEN, Xiuda YANG, Ling ZHANG, Feng XU, Jingbo CHEN, Songtao MAO, Zhenwei WU, Liqun HU   +9 more
openaire   +1 more source