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A megawatt solid-state modulator for high repetition rate pulse generation.

Y Wang1, P Pribyl1, W Gekelman1

  • 1Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.

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Summary

A new solid-state modulator generates rapid, consecutive high-power microwave pulses for plasma interaction studies. Its modular design offers flexibility and cost-effectiveness for advanced pulsed power applications.

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Area of Science:

  • Physics
  • Electrical Engineering
  • Plasma Science

Background:

  • High-power microwave (HPM) pulses are crucial for plasma interaction research.
  • Previous experimental setups utilized single-pulse generators, limiting rapid pulsing capabilities.
  • A need exists for advanced modulators capable of generating controlled, high-frequency pulse bursts.

Purpose of the Study:

  • To design and construct a novel solid-state modulator for generating rapid consecutive power pulses.
  • To enable experiments investigating plasma interaction with high-power microwave pulses.
  • To present a cost-effectiveness analysis of the new modulator design.

Main Methods:

  • A solid-state modulator was constructed using 480 μF capacitors, 24 synchronized MOSFETs, and 6 step-up transformers.
  • The modulator is designed to output a 100 kHz tone burst, comprising up to 10 pulses.
  • Each pulse has a 1 μs duration and 1 MW peak power.

Main Results:

  • The novel modulator successfully generates rapid consecutive power pulses.
  • The design facilitates a 100 kHz tone burst with specified pulse parameters (1 μs, 1 MW).
  • The modular design offers significant advantages over older single-pulse systems.

Conclusions:

  • The developed solid-state modulator provides a flexible and powerful tool for plasma-microwave interaction experiments.
  • The modular architecture enhances applicability and potential for future research.
  • The modulator presents a cost-effective solution for pulsed power generation.