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Träfflista för sökning "WFRF:(Fülöp Tünde 1970) "

Sökning: WFRF:(Fülöp Tünde 1970)

  • Resultat 1-10 av 236
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2.
  • Anderson, Dan, 1943, et al. (författare)
  • Electron beam transport - revisited
  • 1998
  • Ingår i: Nuclear Science and Engineering. ; 129, s. 51-
  • Tidskriftsartikel (refereegranskat)
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  • Appel, L.C., et al. (författare)
  • Observation of CAEs on MAST
  • 2004
  • Ingår i: In Proc. of 31st EPS Conf. of Plasma Physics, London, 2004, ECA. ; 28B, s. 4.195-
  • Konferensbidrag (refereegranskat)
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7.
  • Berger, Esmée, 1998, et al. (författare)
  • Runaway dynamics in reactor-scale spherical tokamak disruptions
  • 2022
  • Ingår i: Journal of Plasma Physics. - 0022-3778 .- 1469-7807. ; 88:6
  • Tidskriftsartikel (refereegranskat)abstract
    • Understanding generation and mitigation of runaway electrons in disruptions is important for the safe operation of future tokamaks. In this paper we investigate the runaway dynamics in reactor-scale spherical tokamaks, focusing on a compact nominal design with a plasma current of 21 megaamperes (MA), 1.8 T magnetic field on axis and major radius of approximately 3 m. We study both the severity of runaway generation during unmitigated disruptions, and the effect that typical mitigation schemes based on massive material injection have on runaway production. The study is conducted using the numerical framework DREAM (Disruption Runaway Electron Analysis Model). We find that, in many cases, mitigation strategies are necessary to prevent the runaway current from reaching multi-MA levels. Our results indicate that, with a suitably chosen deuterium–neon mixture for mitigation, it is possible to achieve a tolerable runaway current and ohmic current evolution. However, this does not account for the runaway source due to wall activation, which has been found to severely limit successful mitigation at conventional aspect ratios, but whose definition requires a more complete wall specification. Furthermore, the majority of the thermal energy loss is found to happen through radial transport rather than radiation, which poses a risk of unacceptable localised heat loads.
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  • Cantono, Giada, et al. (författare)
  • Laser-driven proton acceleration from ultrathin foils with nanoholes
  • 2021
  • Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322 .- 2045-2322. ; 11:1
  • Tidskriftsartikel (refereegranskat)abstract
    • Structured solid targets are widely investigated to increase the energy absorption of high-power laser pulses so as to achieve efficient ion acceleration. Here we report the first experimental study of the maximum energy of proton beams accelerated from sub-micrometric foils perforated with holes of nanometric size. By showing the lack of energy enhancement in comparison to standard flat foils, our results suggest that the high contrast routinely achieved with a double plasma mirror does not prevent damaging of the nanostructures prior to the main interaction. Particle-in-cell simulations support that even a short scale length plasma, formed in the last hundreds of femtoseconds before the peak of an ultrashort laser pulse, fills the holes and hinders enhanced electron heating. Our findings reinforce the need for improved laser contrast, as well as for accurate control and diagnostics of on-target plasma formation.
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  • Resultat 1-10 av 236
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tidskriftsartikel (128)
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refereegranskat (202)
övrigt vetenskapligt/konstnärligt (33)
populärvet., debatt m.m. (1)
Författare/redaktör
Fülöp, Tünde, 1970 (221)
Pusztai, Istvan, 198 ... (58)
Embréus, Ola, 1991 (53)
Papp, Gergely, 1985 (38)
Stahl, Adam, 1985 (34)
Hoppe, Mathias, 1993 (20)
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Smith, Håkan, 1976 (18)
Newton, Sarah, 1981 (18)
Lisak, Mietek, 1947 (17)
Vallhagen, Oskar, 19 ... (17)
Helander, Per, 1967 (16)
Helander, Per (16)
Moradi, Sara, 1981 (15)
Fülöp, Tünde-Maria, ... (14)
Mollén, Albert, 1985 (14)
Gál, Kinga (12)
Anderson, Dan, 1943 (12)
Wilkie, George, 1983 (12)
Nordman, Hans, 1957 (10)
Siminos, Evangelos, ... (10)
Hirvijoki, Eero, 198 ... (10)
Landreman, M. (9)
Dubois, Timothy, 198 ... (9)
Strand, Pär, 1968 (8)
Ferri, Julien, 1990 (8)
Tinguely, R. A. (8)
Decker, Joan, 1977 (8)
Reux, C (7)
Eriksson, L. G. (7)
Sweeney, R. (7)
Drevlak, M (7)
Lehnen, M (6)
Ongena, J (6)
Weiland, Jan, 1944 (6)
Omotani, John, 1985 (6)
Pautasso, G (6)
Paz-Soldan, C. (6)
Hollmann, E. M. (6)
Granetz, R. (6)
Särkimäki, Konsta, 1 ... (6)
Alper, B (5)
Mlynar, J (5)
Van Eester, D (5)
Insulander Björk, Kl ... (5)
Conway, N.J. (5)
Field, A.R. (5)
Helander, P (5)
Candy, Jeff (5)
Belli, E (5)
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