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    A novel pumping method using one long and two short pulses (1L2S) enhances control over soft x-ray laser plasma amplifiers. This technique improves spatial extent, brilliance, and gain lifetime for seeded laser operation.

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    Area of Science:

    • Plasma physics
    • Laser technology
    • X-ray science

    Background:

    • Developing efficient soft x-ray laser plasma amplifiers for seeded operation necessitates enhanced control over spatial extent, brilliance, and gain lifetime.
    • Current methods face challenges in optimizing these parameters simultaneously.

    Purpose of the Study:

    • To investigate the efficacy of a novel pumping scheme for improved control of soft x-ray laser plasma amplifiers.
    • To explore the tunability of gain lifetime in specific x-ray laser systems using this new method.

    Main Methods:

    • Utilizing a one long and two short pump pulses (1L2S) configuration to pump plasma amplifiers.
    • Analyzing the Ni-like Ag x-ray laser for spatial extent, brilliance, and gain lifetime control.
    • Investigating the Ne-like Ti x-ray laser for gain lifetime tunability.

    Main Results:

    • The 1L2S pumping scheme demonstrates significant advantages in controlling transverse spatial extent, brilliance, and gain lifetime for Ni-like Ag x-ray lasers.
    • Substantial tunability of the gain lifetime was observed in the 1L2S scheme for Ne-like Ti x-ray lasers.
    • The findings indicate potential benefits for direct and chirped harmonics seeding amplification approaches.

    Conclusions:

    • The 1L2S pumping scheme offers a promising approach for precise control of soft x-ray laser plasma amplifiers.
    • This method can lead to more efficient pump energy utilization and reduced amplified spontaneous emission.
    • The observed gain lifetime tunability opens new avenues for advanced seeded x-ray laser applications.