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How to Ignite an Atmospheric Pressure Microwave Plasma Torch without Any Additional Igniters
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Active microwave pulse compressor using an electron-beam triggered switch.

O A Ivanov1, M A Lobaev2, A L Vikharev1

  • 1Institute of Applied Physics RAS, Nizhny, Novgorod 603600, Russia and Omega-P, Inc., New Haven, Connecticut 06510, USA.

Physical Review Letters
|August 29, 2014
PubMed
Summary

A novel high-power microwave pulse compressor utilizes electron-beam discharge to modulate cavity quality factor, achieving record power gains. This technology offers significant advancements in high-power microwave generation.

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Area of Science:

  • Physics
  • Electrical Engineering
  • Microwave Engineering

Background:

  • High-power microwave (HPM) generation is crucial for various applications.
  • Existing pulse compression techniques face limitations in efficiency and power handling.
  • Modulating cavity quality factor offers a potential pathway for enhanced HPM generation.

Purpose of the Study:

  • To describe a novel active microwave pulse compressor.
  • To detail the principle of operation based on mode conversion and electron-beam discharge.
  • To present experimental results validating the device's performance.

Main Methods:

  • Development of a high-power active microwave pulse compressor.
  • Utilizing mode conversion within an energy storage cavity.
  • Employing a triggered electron-beam discharge across a switch cavity to modulate quality factor.
  • Testing the device configuration and analyzing output parameters.

Main Results:

  • Achieved output peak power of 140-165 MW.
  • Demonstrated record peak power gains ranging from 16:1 to 20:1.
  • Produced output pulses with a Full Width at Half Maximum (FWHM) duration of 16-20 ns at 11.43 GHz.

Conclusions:

  • The described active microwave pulse compressor successfully achieves high peak power and significant power gains.
  • The method of modulating cavity quality factor via electron-beam controlled mode conversion is effective.
  • This technology represents a significant advancement in high-power microwave pulse compression.