A repetitive long-pulse power generator based on pulse forming network and linear transformer driver

Area of Science:

• High-energy physics and pulsed power systems.
• Electrical engineering and pulsed power technology.

Background:

• Development of compact and efficient pulsed power modules is crucial for various scientific and industrial applications.
• Existing systems often face challenges in achieving long pulse durations, high amplitudes, and reliable repetitive operation.

Purpose of the Study:

• To design and develop a compact module for a long-pulse power generator utilizing a Blumlein pulse forming network (PFN).
• To integrate multiple modules into a repetitive generator system and evaluate its performance characteristics.

Main Methods:

• Designed a compact module featuring two L-type Blumlein PFNs with 20 Ω characteristic impedance.
• Symmetrically connected the PFNs to a linear transformer driver (LTD) primary coil, synchronized by high-voltage spark switches.
• Tested the module with a 10 Ω water load, achieving specific output pulse parameters (amplitude, duration, rise time, flat top).

Main Results:

• The single module delivered an output pulse of approximately 135 kV amplitude and 200 ns duration with a ~100 ns flat top.
• A repetitive generator composed of four modules achieved an output voltage of ~560 kV and current of ~10 kA into a planar diode.
• The generator demonstrated stable operation, producing over 10^4 pulses at a 25 Hz repetition rate with a continuous operating time of up to 60 seconds.

Conclusions:

• The developed Blumlein PFN-LTD based module is effective for generating long-duration, high-voltage pulses.
• The multi-module generator system offers a stable and reliable solution for high-power, repetitive pulsed applications.
• The system's performance indicates significant potential for use in areas requiring intense pulsed power.