Results 21 to 30 of about 131,786 (274)

Impurity-induced divertor plasma oscillations

Physics of Plasmas, 2016
Two different oscillatory plasma regimes induced by seeding the plasma with high- and low-Z impurities are found for ITER-like divertor plasmas, using computer modeling with the DUSTT/UEDGE and SOLPS4.3 plasma-impurity transport codes. The oscillations are characterized by significant variations of the impurity-radiated power and of the peak heat load ...
R. D. Smirnov, A. S. Kukushkin, S. I. Krasheninnikov, A. Yu. Pigarov, T. D. Rognlien   +4 more
openaire   +2 more sources

Characterization of a spheromak plasma gun: The effect of refractory electrode coatings [PDF]

, 1991
In order to investigate the proposition that high-Z impurities are responsible for the anomalously short lifetime of the Caltech spheromak, the center electrode of the spheromak plasma gun has been coated with a variety of metals (bare steel, copper ...
Bailey, A. D., III, Bellan, P. M., Brown, M. R.   +2 more
core   +1 more source

Development and validation of analytical method for determination of elemental impurities in micafungin for injection [PDF]

Acta Poloniae Pharmaceutica
Elemental impurities contained in drug product create a risk for patients and potential toxic elemental impurities defined and classified in Guideline for Elemental Impurities Q3D(R1). Among the finished product dosage forms, parenteral products could be
Sena Ozlem Gundogdu, Seda Turhan, Aynur Ozel Babacanoglu, Tugce Catak, Adem Sahin   +4 more
doaj   +1 more source

Turbulent transport of impurities and their effect on energy confinement [PDF]

, 2012
By presenting linear and nonlinear gyrokinetic studies, based on a balanced neutral beam injection deuterium discharge from the DIII-D tokamak, we demonstrate that impurities alter the scaling of the transport on the charge and mass of the main species ...
Candy, J., Fulop, T., Mollen, A., Pusztai, I.   +3 more
core   +2 more sources

Impact of impurities on the effective charge state distribution in the limiter plasmas of Wendelstein 7-X

Nuclear Materials and Energy, 2019
Carbon and oxygen have been identified as the two major impurities in the first limiter operational phase of the stellarator Wendelstein 7-X. We evaluate basic differences between these impurities regarding the effective charge state in the boundary ...
J. Cosfeld, M. Rack, D. Reiter, P. Drews, Y. Feng, D. Zhang   +5 more
doaj   +1 more source

Impurity Behavior in Plasma Recovery after a Vacuum Failure in the Experimental Advanced Superconducting Tokamak

Applied Sciences, 2023
After a vacuum failure in a tokamak, plasma runaway or plasma disruptions frequently occur during plasma recovery, causing difficulties in rebuilding a well-confined collisional plasma.
Zihang Zhao, Ling Zhang, Ruijie Zhou, Yang Yang, Wenmin Zhang, Yunxin Cheng, Shigeru Morita, Ang Ti, Ailan Hu, Zhen Sun, Fengling Zhang, Weikuan Zhao, Zhengwei Li, Yiming Cao, Guizhong Zuo, Haiqing Liu   +15 more
doaj   +1 more source

Modelling of turbulent impurity transport in fusion edge plasmas using measured and calculated ionization cross sections

, 2014
Turbulent transport of trace impurities impurities in the edge and scrape-off-layer of tokamak fusion plasmas is modelled by three dimensional electromagnetic gyrofluid computations including evolution of plasma profile gradients.
Kendl, Alexander
core   +1 more source

Plasmon dispersion in quasi-one and one-dimensional systems with non-magnetic impurities

, 2008
We calculate the plasmon dispersion in quasi-one-dimensional quantum wires, in the presence of non-magnetic impurities, taking into consideration the memory function formalism and the role of the forward scattering. The plasma frequency is reduced by the
Das Sarma, Giuliani, Goni, Götze, I. Grosu, Kopietz, L. Tugulan, Li, Luttinger, Rickayzen, Ritsko, Schwartz, Thakur, Tomonaga, Williams   +14 more
core   +1 more source

Explanation of Experimentally Observed Phenomena in Hot Tokamak Plasmas from the Nonequilibrium Thermodynamics Position

Entropy, 2019
In studying the hot plasma behavior in tokamak devices, the classical approach for collisional processes is traditionally used. This approach leaves unexplained a number of phenomena observed in experiments related to plasma energy confinement.
Ksenia A. Razumova, Valerii F. Andreev, Nadezhda V. Kasyanova, Sergey E. Lysenko   +3 more
doaj   +1 more source

Impurity transport in temperature gradient driven turbulence [PDF]

, 2011
In the present paper the transport of impurities driven by trapped electron (TE) mode turbulence is studied. Non-linear (NL) gyrokinetic simulations using the code GENE are compared with results from quasilinear (QL) gyrokinetic simulations and a ...
A. Skyman, H. Nordman, Helander P., P. Strand   +3 more
core   +2 more sources