D. A. Shiffler

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Gated field emission cathodes can provide short electron pulses without the requirement of laser systems or cathode heating required by photoemission or thermionic cathodes. The large electric field requirement for field emission to take place can be achieved by using a high aspect ratio cathode with a large field enhancement factor which reduces the(More)
  • A. Ramrus, G. Rohwein, +4 authors K. Golby
  • 2014
An output switch system has been developed for a 100 Ω PFN. The output pulse to a matching load has 0.55 MV peak amplitude, with a 1 μs pulse width. The PFN is resonant-charged to voltages up to 1.1 MV and operates at rep-rates up to 5 Hz. The switch connects the high-voltage output terminal of the PFN directly to the load. This in-line configuration calls(More)
For over the last decade, the concept of metamaterials has led to new approaches for considering the interaction of radiation with complex structures. However, practical manifestations of such a device operating at high power densities have proven difficult to achieve due to the resonant nature of metamaterials and the resultant high electric fields, which(More)
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