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    The Mechanism of Cosmic Magnetic Fields explored in the Laboratory

    January 19, 2023, Categories  Astronomy/Space

    Contours of magnetic fields that emerge a result of self-organization of microscopic currents resulting from the Weibel instability in a carbon dioxide laser-produced plasma probed by an ultrashort relativistic electron beam.
    Contours of magnetic fields that emerge a result of self-organization of microscopic currents resulting from the Weibel instability in a carbon dioxide laser-produced plasma probed by an ultrashort relativistic electron beam.
    Image courtesy of Chaojie Zhang, University of California Los Angeles

    A novel experiment sheds new light on a possible mechanism that may seed magnetic fields for the galactic dynamo. Recent research shows that magnetic fields can spontaneously emerge in a plasma if the plasma has a temperature anisotropy. This mechanism is known as the Weibel instability. This new research is the first to unambiguously observe the Weibel instability in the laboratory...

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