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This work presents the results of an investigation of an atmospheric plasma jet, ignited in argon containing 0.26% of water. The jet operates in an atmospheric pressure air surrounding but is shielded with a coaxial argon flow. The plasma jet is excited by a 200 ns pulsed voltages at voltage of 4.7 kV at a frequency of 5 kHz. The jet is impinging on a metal plate electrode connected to ground through...
Coherent terahertz radiation obtained from double bunched sheet electron beams over a surface evanescent wave provides an effective method to extend the operating frequency and power capacity. An overmoded ridge-loaded grating waveguide was introduced in our double sheet beam backward wave oscillator (BWO) design. The fundamental mode TM11 was updated to the TM21++ mode, which is compact to integrate...
An Oscillator of Relativistic Extended Interaction Cavity (REICO) is presented and manufactured successfully for the first time. The problems encountered with in the initial experiment are investigated, and the pillboxes and the triaxial output cavity of the REICO are optimized in this paper. The mode-competition of modulation was overcome by adjusting the gap width of pillboxes. The output microwave...
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