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Stable multi-GeV electron accelerator driven by waveform-controlled PW laser pulses.

Hyung Taek Kim1,2, V B Pathak1, Ki Hong Pae1,2

  • 1Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Korea.

Scientific Reports
|September 2, 2017
PubMed
Summary

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This summary is machine-generated.

Controlling laser pulse chirp via a programmable optical technique enhances laser wakefield acceleration (LWFA). This method yields stable 2-GeV electron beams, paving the way for compact GeV-electron accelerators and radiation sources.

Area of Science:

  • Plasma Physics
  • Laser-Plasma Interactions
  • Particle Acceleration

Background:

  • Laser wakefield acceleration (LWFA) faces challenges in achieving high electron beam energy and stability.
  • LWFA processes are highly nonlinear and sensitive to initial experimental conditions.

Purpose of the Study:

  • To develop a simple, optical, and programmable method to control laser pulse chirp for enhanced LWFA performance.
  • To investigate the impact of laser pulse spectral phase on electron beam energy and stability.

Main Methods:

  • Utilized a fully optical and programmable technique to precisely control the chirp of petawatt (PW) laser pulses.
  • Applied waveform control to the laser wakefield acceleration process in a helium gas cell.

Main Results:

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  • Demonstrated sensitive dependence of electron beam energy and stability on the laser pulse's spectral phase.
  • Successfully obtained stable 2-GeV electron beams from a centimeter-scale helium gas cell.

Conclusions:

  • Waveform control of laser pulses is an effective strategy for improving LWFA performance.
  • This technique enables the development of compact GeV-electron accelerators for applications in X-ray and gamma-ray compact radiation sources.