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Przejdź do strony domowej biblioteki Pedagogiczna Biblioteka Wojewódzka im. Komisji Edukacji Narodowej w Lublinie Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaPedagogiczna Biblioteka Wojewódzka im. Komisji Edukacji Narodowej w Lublinie
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Wyświetlanie 1-10 z 20
Tytuł:
Influence of powerful pulses of hydrogen plasma upon materials in PF-1000 device
Autorzy:
Pimenov, V.
Gribkov, V.
Dubrovsky, A.
Mezzetti, F.
Scholz, M.
Ugaste, U.
Dyomina, E.
Ivanov, L.
Maslyaev, S.
Miklaszewski, R.
Borowiecki, M.
De Chiara, P.
Pizzo, L.
Szydlowski, A.
Volobuev, I. V.
Tematy:
dense plasma focus (DPF)
ion beam
irradiation
plasma jet
surface damage
test specimen
Pokaż więcej
Wydawca:
Instytut Chemii i Techniki Jądrowej
Powiązania:
https://bibliotekanauki.pl/articles/147096.pdf  Link otwiera się w nowym oknie
Opis:
The results of experimental investigations of powerful hydrogen plasma jets and fast ion beams interaction with various materials (austenitic chromium-manganese steels, pure vanadium, tungsten, graphite, copper, and their alloys: Cu-4 mass% Ni and Cu-10 mass% Ga) are presented. The materials were placed on the discharge axis of the PF-1000 device and irradiated with fluxes of fast ions (of energy in the range from tens keV up to several MeV) and with plasma streams (of power flux density q~(108 109) W/cm2). It was found that the fast ions and plasma streams caused different damages to the aforementioned materials. A diverse character of the damages to the individual investigated material was revealed. Some peculiarities of the process as well as the correlation between the surface density of the "macroscopic" structural defects (blisters and craters) and the fluence of the fast ions implanted in the specimen are discussed.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental study of a powerful energy flow effect on materials in PF-1000 installation
Autorzy:
Borowiecki, M.
De Chiara, P.
Dubrovsky, A. V.
Dyomina, E. V.
Gribkov, V. A.
Ivanov, L. I.
Maslyaev, S. A.
Mezzetti, F.
Miklaszewski, R.
Pimenov, V. N.
Pizzo, L.
Scholz, M.
Szydlowski, A.
Ugaste, Y. E.
Volobuev, I. V.
Tematy:
dense plasma focus (DPF)
irradiation
plasma jet
shock wave
test specimen
Pokaż więcej
Wydawca:
Instytut Chemii i Techniki Jądrowej
Powiązania:
https://bibliotekanauki.pl/articles/148824.pdf  Link otwiera się w nowym oknie
Opis:
The report describes some of the results obtained in an experimental study of the impact of a powerful plasma stream and a fast ion beam generated in a PF-1000 device on different materials perspective for the use in radiation loaded parts of pulsed plasma installations. Investigations were done during and after the interaction processes. It is shown that in case of irradiation of samples only by high power flux density plasma streams the effect of detachment still preserved. At the same time a low power flux density high-energy ion beam plays an important role in the process of saturation of the irradiated material by hydrogen.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
LOFAR Facet Calibration
Autorzy:
Best, P. N.
Bonafede, A.
Croston, J. H.
Orrú, E.
Miley, G. K.
Jarvis, M. J.
Rafferty, D. A.
Heald, G.
Ogrean, G. A.
Sridhar, S. S.
White, G. J.
Bîrzan, L.
Dijkema, T. J.
Murray, S. S.
Andrade-Santos, F.
Jones, C.
Brüggen, M.
van der Tol, S.
Sarazin, C. L.
Forman, W. R.
Chyży, Krzysztof
Sabater, J.
Intema, H. T.
Brunetti, G.
Dawson, W. A.
Ensslin, T.
Röttgering, H. J. A.
Simionescu, A.
van Weeren, R. J.
Rudnick, L.
Williams, W. L.
Ferrari, C.
de Gasperin, F.
Horellou, C.
Shimwell, T. W.
Hoeft, M.
Hardcastle, M. J.
Mevius, M.
Pizzo, R.
Kraft, R. P.
Cassano, R.
Stroe, A.
Opis:
LOFAR, the Low-Frequency Array, is a powerful new radio telescope operating between 10 and 240 MHz. LOFAR allows detailed sensitive high-resolution studies of the low-frequency radio sky. At the same time LOFAR also provides excellent short baseline coverage to map diffuse extended emission. However, producing high-quality deep images is challenging due to the presence of direction-dependent calibration errors, caused by imperfect knowledge of the station beam shapes and the ionosphere. Furthermore, the large data volume and presence of station clock errors present additional difficulties. In this paper we present a new calibration scheme, which we name facet calibration, to obtain deep high-resolution LOFAR High Band Antenna images using the Dutch part of the array. This scheme solves and corrects the direction-dependent errors in a number of facets that cover the observed field of view. Facet calibration provides close to thermal noise limited images for a typical 8 hr observing run at ∼ 5'' resolution, meeting the specifications of the LOFAR Tier-1 northern survey.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
A plethora of diffuse steep spectrum radio sources in Abell 2034 revealed by LOFAR
Autorzy:
Luckin, J.
Bonafede, A.
Sridhar, S. S.
Intema, H. T.
Sabater, J.
Röttgering, H. J. A.
Williams, W. L.
Ferrari, C.
Retana-Montenegro, E.
Orrú, E.
Hoang, D. N.
Heald, G. H.
White, G. J.
Brüggen, M.
Owers, M. S.
Enßlin, T. A.
van Weeren, R. J.
Shimwell, T. W.
Hoeft, M.
Haverkorn, M.
Best, P. N.
Hardcastle, M. J.
de Gasperin, F.
Morabito, L. K.
Horellou, C.
Stroe, A.
McKean, J. P.
Cassano, R.
Brunetti, G.
Pizzo, R.
Chyży, Krzysztof
Opis:
With Low-Frequency Array (LOFAR) observations, we have discovered a diverse assembly of steep spectrum emission that is apparently associated with the intracluster medium (ICM) of the merging galaxy cluster Abell 2034. Such a rich variety of complex emission associated with the ICM has been observed in few other clusters. This not only indicates that Abell 2034 is a more interesting and complex system than previously thought but it also demonstrates the importance of sensitive and high-resolution, low-frequency observations. These observations can reveal emission from relativistic particles which have been accelerated to sufficient energy to produce observable emission or have had their high energy maintained by mechanisms in the ICM. The most prominent feature in our maps is a bright bulb of emission connected to two steep spectrum filamentary structures, the longest of which extends perpendicular to the merger axis for 0.5 Mpc across the south of the cluster. The origin of these objects is unclear, with no shock detected in the X-ray images and no obvious connection with cluster galaxies or AGNs. We also find that the X-ray bright region of the cluster coincides with a giant radio halo with an irregular morphology and a very steep spectrum. In addition, the cluster hosts up to three possible radio relics, which are misaligned with the cluster X-ray emission. Finally, we have identified multiple regions of emission with a very steep spectral index that seem to be associated with either tailed radio galaxies or a shock.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Wyświetlanie 1-10 z 20

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