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Automated Delivery of Microfabricated Targets for Intense Laser Irradiation Experiments
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Published on: January 28, 2021

Surface electron acceleration in relativistic laser-solid interactions.

Min Chen, Zheng-Ming Sheng, Jun Zheng

    Optics Express
    |June 12, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Intense laser interactions with solid targets generate quasistatic fields, enabling surface betatron acceleration of electrons. This process, akin to inverse free-electron-laser acceleration, is modeled analytically.

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    Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
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    Published on: July 2, 2012

    Area of Science:

    • Plasma Physics
    • Laser-Matter Interaction
    • Computational Physics

    Background:

    • Relativistic intense laser pulses interacting with solid targets are a key area in high-energy-density physics.
    • Understanding particle acceleration mechanisms is crucial for applications in fusion energy and particle accelerators.

    Purpose of the Study:

    • To investigate electron acceleration mechanisms occurring at the surface of a solid target under intense laser irradiation.
    • To propose and validate an analytical model for a novel surface acceleration process.

    Main Methods:

    • Utilized two-dimensional particle-in-cell (PIC) simulations to model the laser-plasma interaction.
    • Analyzed the generation and behavior of quasistatic electric and magnetic fields near the target surface.
    • Developed an analytical model for the observed electron acceleration.

    Main Results:

    • Intense quasistatic magnetic and electric fields are generated near the target surface during laser interaction.
    • Electrons are confined and exhibit betatron oscillations within these fields.
    • Significant electron acceleration is observed when the betatron oscillation frequency matches the laser frequency, termed surface betatron acceleration.

    Conclusions:

    • The study demonstrates a new electron acceleration mechanism, surface betatron acceleration, driven by laser-induced quasistatic fields.
    • The proposed analytical model provides a framework for understanding and predicting this acceleration phenomenon.
    • Findings contribute to the understanding of laser-driven particle acceleration in plasma.