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Wyszukujesz frazę "stellarator" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Nuclear fusion and its large potential for the future world energy supply
Autorzy:
Ongena, J.
Powiązania:
https://bibliotekanauki.pl/articles/147328.pdf
Data publikacji:
2016
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
energy
nuclear fusion
tokamak
stellarator
Opis:
An overview of the energy problem in the world is presented. The colossal task of ‘decarbonizing’ the current energy system, with ~85% of the primary energy produced from fossil sources is discussed. There are at the moment only two options that can contribute to a solution: renewable energy (sun, wind, hydro, etc.) or nuclear fission. Their contributions, ~2% for sun and wind, ~6% for hydro and ~5% for fission, will need to be enormously increased in a relatively short time, to meet the targets set by policy makers. The possible role and large potential for fusion to contribute to a solution in the future as a safe, nearly inexhaustible and environmentally compatible energy source is discussed. The principles of magnetic and inertial confinement are outlined, and the two main options for magnetic confi nement, tokamak and stellarator, are explained. The status of magnetic fusion is summarized and the next steps in fusion research, ITER and DEMO, briefly presented.
Źródło:
Nukleonika; 2016, 61, 4; 425-432
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conceptual design of Light Impurity Monitor for Wendelstein 7-X
Autorzy:
Książek, I.
Burhenn, R.
Musielok, J.
Powiązania:
https://bibliotekanauki.pl/articles/146640.pdf
Data publikacji:
2011
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
plasma spectroscopy
stellarator
soft X-ray
Opis:
As plasma impurity ions can significantly influence the properties of a fusion plasma by dilution and enhancement of the radiation losses, the process of monitoring of their concentrations is one of the most important tasks. A Light Impurity Monitor is needed for monitoring the contamination of the stellarator plasma by carbon, nitrogen, boron, and oxygen impurities, which are indicators for the overload of the plasma facing components, leakage of the vacuum vessel, or wall condition, respectively. Their concentration will be estimated on the basis of emission intensities of their hydrogen-like ions. In this paper a conceptual design of such a spectrometer is presented, including the description of the geometry, the acquisition system and safety systems.
Źródło:
Nukleonika; 2011, 56, 2; 155-160
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Progress in stellarator research at IPP-Kharkov
Autorzy:
Moiseenko, V. E.
Lozin, O. V.
Shapoval, A. M.
Dreval, M. B.
Kulyk, Y. S.
Mironov, Y. K.
Romanov, V. S.
Pashnev, V. K.
Sorokovoy, E. L.
Petrushenya, A. A.
Ozherel’ev, F. I.
Kozulya, M. M.
Konovalov, V. G.
Maznichenko, S. M.
Garkusha, I. E.
Powiązania:
https://bibliotekanauki.pl/articles/146173.pdf
Data publikacji:
2016
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
stellarator
radio-frequency heating
low frequency modes
magnetic diagnostics
Opis:
A new antenna of ‘crankshaft’ type has been installed in the Uragan-2M device in order to increase the plasma density and heating below the ion cyclotron frequency. Antenna operation is modelled by 1D code, which solves boundary problem for time-harmonic Maxwell’s equations in radially non-uniform plasma cylinder. In recent experiments with this antenna, the SXR, CV, OV and OII emission measurements indicate that the light impurity radiation barrier is overcame at this device. Plasma with a temperature of ~50 eV exists during a short period of a few milliseconds. Then the radiation collapse comes owing to strong infl ux of impurities to the plasma column. A new magnetic diagnostics has been installed at Uragan-3M. Using it the poloidal magnetic fi eld is measured and the shift of toroidal current in major radius is registered. A miniature pinhole camera array for spatially and temporally resolved measurements of soft X-ray (SXR) plasma emission has been recently installed on the U-3M. Different shapes of the SXR emission profi le has been observed in different discharge conditions.
Źródło:
Nukleonika; 2016, 61, 2; 91-97
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical studies of plasma edge in W7-X with 3D FINDIF code
Autorzy:
Jabłczyńska, Małgorzata
Pełka, Grzegorz
Jakubowski, Marcin
Ślęczka, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/24202755.pdf
Data publikacji:
2023
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
3D modelling
limiter
scrape-off layer
stellarator
Wendelstein 7X
Opis:
Modelling of the plasma transport for inherently three-dimensional (3D) problems as in stellarators requires dedicated complex codes. FINDIF is a 3D multifl uid plasma edge transport code that has been previously successfully used for the analysis of energy transport in the TEXTOR-DED tokamak [1], where 3D perturbations led to an ergodic structure of fi eld lines in the plasma edge. The ongoing efforts to apply it meaningfully to Wendelstein 7-X (W7-X) plasma problems resulted in advancements in the main model and accompanying tools for mesh generation and post-processing. In order to verify the applicability of the code and to compare with the reported simulation (EMC3-EIRENE) and experimental (OP1.1) results, a series of simulations for varying plasma density, temperature and anomalous transport coeffi cients as well as for fi xed input power were performed. The connection length pattern of FINDIF traced magnetic fi eld lines on the limiter was reproduced and its impact on heat loads was confi rmed. An increase in the peak heat load on the limiter with a rise in plasma density, temperature and anomalous plasma transport coeffi cients was observed. The decay lengths of density, electron temperature and heat fl ux did not change with density, and were decreasing with temperature and increasing with anomalous plasma transport coeffi cient, which was compared to the simple scrape-off layer (SOL) model.
Źródło:
Nukleonika; 2023, 68, 4; 83--90
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fusion 2050 : European and Polish Perspective
Autorzy:
Romaniuk, R. S.
Powiązania:
https://bibliotekanauki.pl/articles/226588.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
European research programs
7FP
accelerator science and technology
large research infrastructures
JET
ITER
IFMIF
DEMO
nuclear fusion
thermonuclear power engineering
DT fusion
Neutrons
aneutronic technologies
inertial fusion
tokomak
stellarator
fusion reactor
tritium
electronics for fusion
Opis:
Fusion, in all its varieties, is a very current subject of science and technology. The results of strongly exothermic reaction of thermonuclear fusion between nuclei of deuterium and tritium are: helium nuclei and neutrons, plus considerable kinetic energy of neutrons of over 14 MeV. DT nuclides synthesis reaction is probably not the most favorable one for energy production, but is the most advanced technologically. More efficient would be possibly an aneutronic fusion. The EU by its EURATOM agenda prepared a Road Map for research and implementation of Fusion as a commercial method of thermonuclear energy generation in the time horizon of 2050. The milestones on this road are tokomak experiments JET, ITER and DEMO, and neutron experiment IFMIF. There is a hope, that by engagement of the national government, and all research and technical fusion and plasma communities, part of this Road Map may be realized in Poland. The infrastructure build for fusion experiments may be also used for material engineering research, chemistry, biomedical, associated with environment protection, power engineering, security, etc. Construction of such research and industrial accelerator and tokomak infrastructure may have potentially a profound meaning for the development of science and technology in Poland.
Źródło:
International Journal of Electronics and Telecommunications; 2014, 60, 1; 95-101
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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