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    The Laser Megajoule (LMJ) facility is a leading inertial confinement fusion laser, now operational with 88 beams delivering 330 kJ. Future upgrades aim to reach 1.3 MJ, advancing fusion energy research.

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    Area of Science:

    • Physics
    • Engineering

    Background:

    • The Laser Megajoule (LMJ) is a major global facility for inertial confinement fusion (ICF).
    • Construction began in 2003, with initial laser operations starting in 2014.

    Purpose of the Study:

    • To describe the LMJ laser system and its operational performance.
    • To detail initial laser campaigns for enhancing energy and power delivery.
    • To outline the path towards increased LMJ performance.

    Main Methods:

    • Operation of 11 laser bundles, comprising 88 large-aperture laser beams.
    • Delivery of up to 330 kJ energy at 351 nm wavelength to a central target.
    • Preparation for increased energy and power through dedicated laser campaigns.

    Main Results:

    • Currently, 88 beams are operational, delivering significant energy for ICF experiments.
    • Initial campaigns have successfully prepared the system for performance enhancements.
    • The facility is set to increase its energy output with further bundle installations.

    Conclusions:

    • The LMJ laser system is a key asset in ICF research, demonstrating robust operational capabilities.
    • Ongoing development and campaigns are crucial for achieving higher energy yields.
    • LMJ is poised to reach 1.3 MJ with 22 bundles, significantly boosting fusion research potential.