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Sökning: swepub > Larsson Anders > Kungliga Tekniska Högskolan > Refereegranskat > Nyholm Sten E. > Möller Cecilia

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1.
  • Elfsberg, Mattias, et al. (författare)
  • Experimental Studies of Anode and Cathode Materials in a Repetitive Driven Axial Vircator
  • 2008
  • Ingår i: IEEE Transactions on Plasma Science. - 0093-3813. ; 36, s. 688-693
  • Tidskriftsartikel (refereegranskat)abstract
    •  Repetitive use of a high-power microwave (HPM) radiation source implies strong erosion on cathode and anode materials. Electrode material endurance has been studied in a series of experiments with an axial vircator powered by a compact Marx generator. The Marx generator operated in a 10 Hz repetitive mode with a burst of ten pulses. Velvet and graphite was used as electron-emitting materials, and they showed markedly different pulse characteristics. Three different anode materials were used; stainless steel mesh, stainless steel wires and molybdenum wires, which all had different influence on the pulse characteristics.
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2.
  • Novac, Bucur M., et al. (författare)
  • A 10-GW pulsed power supply for HPM sources
  • 2006
  • Ingår i: IEEE TRANS PLASMA SCI. ; s. 1814-1821
  • Konferensbidrag (refereegranskat)abstract
    • A research activity involving the detailed consideration of novel high-voltage transformers for pulsed-power applications has recently begun at Loughborough University. Although the main goal is the demonstration of a compact and lightweight unit employing magnetic insulation under vacuum conditions, the initial stage of the work is directed toward the development of a conventional air-cored transformer as a main component in a compact power supply for high power microwave sources. In cooperation with the Swedish Defence Research Agency (FOI), the power supply has been tested with a microwave source of the vircator type. The power generator for the system uses a 70-kJ/25-kV capacitor bank and an exploding wire array to generate a 150-kV voltage pulse in the primary circuit of a transformer. A pressurized SF6 spark gap in the secondary circuit sharpens the high-voltage output so that pulses approaching 500 kV and with a rise time well below 100 ns are generated on a 20-Omega high-power resistors With the peak power in excess of 10 GW. Experimental results are presented from final testing of the system, where a reflex triode vircator replaces the 20-Omega resistor. Measurements of the microwave emission using free-field sensors are presented, and comments are made with the microwave emission from the same vircator when powered by a Marx generator at FOI.
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  • Resultat 1-2 av 2
Typ av publikation
tidskriftsartikel (1)
konferensbidrag (1)
Typ av innehåll
refereegranskat  (2)Ta bort avgränsningen
Författare/redaktör
Larsson, Anders, (2)Ta bort avgränsningen
Hurtig, Tomas (2)
Nyholm, Sten E. (2)Ta bort avgränsningen
Elfsberg, Mattias (2)
Möller, Cecilia, (2)Ta bort avgränsningen
Appelgren, Patrik, (1)
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Novac, Bucur M. (1)
Moller, Cecilia (1)
Brown, John (1)
Istenic, Marko (1)
Luo, Jing (1)
Smith, Ivor R. (1)
Hubbard, Martin (1)
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Kungliga Tekniska Högskolan  (2)Ta bort avgränsningen
Uppsala universitet (1)
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Engelska (2)
Ämne (HSV)
Naturvetenskap (1)

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