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Related Experiment Videos

Inverse free electron lasers and laser wakefield acceleration driven by CO2 lasers.

W D Kimura1, N E Andreev, M Babzien

  • 1STI Optronics, Inc. Bellevue, WA 98004-1495, USA. wkimura@stioptronics.com

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|February 18, 2006
PubMed
Summary

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The Staged Electron Laser Acceleration (STELLA) experiment achieved crucial staging in laser-driven accelerators. This research paves the way for more practical and efficient laser particle acceleration technologies.

Area of Science:

  • Physics
  • Particle Acceleration
  • Plasma Physics

Background:

  • The Staged Electron Laser Acceleration (STELLA) experiment previously demonstrated key aspects of laser-driven acceleration.
  • Practical laser-driven accelerators require efficient staging, high electron bunch trapping, and narrow energy spread.

Purpose of the Study:

  • To investigate novel laser wakefield acceleration (LWFA) approaches.
  • To explore the application of the STELLA staging concept to LWFA.
  • To conduct the first LWFA experiments driven by a CO(2) laser beam.

Main Methods:

  • Investigated pseudo-resonant LWFA by launching a laser pulse into low-density plasma to generate steepened laser pulses and strong wakefields.
  • Studied seeded self-modulated LWFA using a seed electron beam to initiate wakefield formation, followed by a laser pulse for amplification.

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  • Employed witness electron beams to probe the generated wakefields in both LWFA schemes.

    • Main Results:

    • Demonstrated staging between two laser-driven devices in the STELLA experiment.
    • Achieved high trapping efficiency of microbunches within the accelerating field.
    • Obtained a narrow energy spread during laser acceleration.

    Conclusions:

    • The STELLA approach and its demonstrated staging are applicable to various laser acceleration methods, including LWFA.
    • The novel LWFA approaches show promise for advancing laser-driven particle acceleration.
    • The use of CO(2) lasers in LWFA opens new avenues for research and development.