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Fiber-coupled laser-driven flyer plates system.

Xing-hai Zhao1, Xiang Zhao, Guang-cun Shan

  • 1Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang Sichuan, 621900, China.

The Review of Scientific Instruments
|May 3, 2011
PubMed
Summary

A new system launches hypervelocity flyer plates using laser-induced plasma. Adding an extra layer nearly doubles kinetic energy, enhancing efficiency for applications like micrometeorite simulation and laser ignition.

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Area of Science:

  • Materials Science
  • Plasma Physics
  • Laser Technology

Background:

  • Development of hypervelocity flyer plate launch systems is crucial for various scientific and engineering applications.
  • Existing methods face challenges in energy efficiency and precise control.
  • Laser-driven plasma generation offers a promising avenue for flyer plate acceleration.

Purpose of the Study:

  • To develop and characterize a novel system for launching hypervelocity flyer plates.
  • To investigate methods for enhancing the energy efficiency and performance of laser-driven flyer plates.
  • To explore the application of optical fiber delivery systems for precise laser energy coupling.

Main Methods:

  • Utilized laser-induced plasma to drive flyer plates (5.5 μm thickness, <1 mm diameter) from aluminum-alumina-aluminum sandwiched films.

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  • Investigated multi-layered flyer plate designs (ablation, insulating, and driving layers) to optimize energy transfer.
  • Employed an optical fiber delivery system for high-power laser coupling and characterized its impact on flyer performance.
  • Measured flyer velocities and planarity using an optical time-of-arrival technique with an optical fiber array probe.

    • Main Results:

    • Achieved flyer velocities of a few km/s, with measured average velocities of 1.7 km/s for ~1 mm diameter plates.
    • Demonstrated enhanced kinetic energy by a factor of nearly 2 (up to 30%) with the addition of an extra layer, improving energy efficiency.
    • Confirmed good planarity of the launched flyer plates.
    • Identified surface finishing quality of the optical fiber as a critical factor for successful flyer plate launch.

    Conclusions:

    • The developed laser-driven system effectively launches hypervelocity flyer plates with good planarity and controllable velocities.
    • The multi-layered flyer plate design significantly enhances kinetic energy and system efficiency.
    • Optical fiber delivery systems are viable for high-power laser coupling in flyer plate launch applications, with fiber quality being paramount.