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Remote electrical arc suppression by laser filamentation.

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    Ultrashort laser pulses create plasma channels that prevent electrical arcs by triggering corona discharges. This discovery offers new methods for lightning and over-voltage protection.

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    Area of Science:

    • Plasma physics
    • Laser-matter interactions
    • Electrical engineering

    Background:

    • High-voltage systems are susceptible to electrical arcs and over-voltages.
    • Controlling electrical discharges in high-voltage environments is crucial for safety and reliability.
    • Ultrashort laser pulses can induce significant changes in gaseous media.

    Purpose of the Study:

    • To investigate the interaction between laser-induced plasma channels and high DC voltage.
    • To explore the potential of laser filaments in mitigating electrical arcing.
    • To understand the underlying physical mechanisms of this interaction.

    Main Methods:

    • Formation of narrow plasma channels via ultrashort laser pulse filamentation.
    • Application of a DC high voltage across electrodes in the presence of laser filaments.
    • Analysis of electrical discharge characteristics and electrode neutralization.

    Main Results:

    • Laser filaments effectively prevent the formation of electrical arcs.
    • Corona discharges are triggered around the high-voltage electrodes by the plasma channels.
    • The phenomenon is attributed to electric field modulation and free electron release.

    Conclusions:

    • Laser-induced plasma channels offer a novel method for preventing electrical arcs.
    • The controlled triggering of corona discharges by laser filaments has significant implications.
    • This research opens new avenues for lightning and over-voltage mitigation strategies.