Development of a laser-triggered film switch for nanosecond rectangular pulse generator.

Area of Science:

• Electrical Engineering
• Pulsed Power Systems
• Plasma Physics

Background:

• Rectangular pulse generators are crucial for impulse measurement calibration and electromagnetic pulse (EMP) effect studies.
• The performance of these generators is significantly influenced by the characteristics of their output switches.

Purpose of the Study:

• To propose and investigate a novel laser-triggered film switch for rectangular pulse generators.
• To address the need for compact and highly repeatable switches in pulsed power applications.

Main Methods:

• Detailed elaboration of the mechanical structure and operating mechanism of the laser-triggered film switch.
• Irradiation experiments to study laser-film interaction and estimate switch inductance.
• Construction and testing of a Blumlein rectangular pulse generator utilizing the developed switch.

Main Results:

• The developed switch enabled a Blumlein generator to operate reliably in consecutive jobs.
• The generator exhibited a wide adjustable amplitude range (2 kV to 10 kV).
• A minimum rise-time of less than 1 nanosecond was achieved, demonstrating high-speed switching capabilities.

Conclusions:

• The novel laser-triggered film switch is a feasible and effective component for rectangular pulse generators.
• The switch's performance is influenced by factors such as laser loophole and film thickness.
• Further investigation into the plasma development process is essential for optimizing switch performance.