Square wave linear transformer driver based on the Blumlein-type pulse forming network and pseudospark switch

Area of Science:

• Electrical Engineering
• Pulsed Power Systems
• High Voltage Technology

Background:

• High-voltage square-wave pulses are crucial for applications like high power microwave generation and flash photography.
• Existing pulse generators face challenges in achieving fast rise times, flat tops, and compact structures.

Purpose of the Study:

• To present a novel square-wave pulse formation approach.
• To combine multichannel pseudospark switch (MCPSS), Blumlein-type pulse forming network (BPFN), and linear transformer driver (LTD) technologies.
• To optimize the output waveform for demanding applications.

Main Methods:

• A single-stage LTD module was developed.
• Waveform modulation techniques were employed.
• Single-gap MCPSS, unequal-capacitance BPFN, and a magnetic switch were utilized for optimization.

Main Results:

• A square wave pulse with 25.0 kV voltage was generated.
• Achieved a fast front (tf) of 24.9 ns.
• Obtained a flat-top bottom width (tbw) of 77.8 ns (90% Umax ~ 90% Umax) and a full width at half maximum of 94.3 ns.

Conclusions:

• The combined MCPSS, BPFN, and LTD approach effectively generates high-voltage square-wave pulses.
• The optimized system meets the stringent requirements for fast front and flat-top pulses.
• This technology holds promise for advancing pulsed power applications.