Argus laser system: performance summary

Area of Science:

• * Laser Physics
• * Plasma Physics
• * Fusion Energy

Background:

• * The Argus system is a key experimental facility for laser fusion research.
• * High-power lasers are essential for initiating and sustaining fusion reactions.

Purpose of the Study:

• * To describe the Argus Nd:glass laser system.
• * To detail methods for enhancing short pulse performance.
• * To analyze the impact of nonlinear instabilities on laser performance.

Main Methods:

• * Utilizing a master oscillator and two 20-cm aperture amplifier chains.
• * Implementing increased aperture filling and image relaying.
• * Employing high-power vacuum spatial filters to manage beam quality.

Main Results:

• * Achieved >4 TW power in <100-psec pulses.
• * Delivered >2 kJ energy in 1-nsec pulses to 100-microm targets.
• * Characterized near-field and far-field performance at various power levels.

Conclusions:

• * Argus system demonstrates significant power delivery capabilities for fusion experiments.
• * Nonlinear beam instabilities limit focal spot intensity, requiring careful management.
• * Advanced optical techniques enhance laser performance for fusion applications.