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Plasma-modulated plasma accelerators (P-MoPAs) can enhance wake amplitude by 72% by controlling laser and plasma parameters. This enables multi-GeV electron acceleration at kilohertz rates, offering a promising avenue for advanced particle acceleration.

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Area of Science:

  • Plasma Physics
  • Laser-Plasma Interactions
  • Particle Acceleration

Background:

  • Plasma-modulated plasma accelerators (P-MoPAs) offer a novel approach to particle acceleration.
  • Optimizing the interaction between laser pulses and plasma is crucial for efficient energy transfer.

Purpose of the Study:

  • To investigate the accelerator stage of P-MoPAs using theoretical and simulation methods.
  • To explore methods for controlling the wake amplitude and electron energy gain in P-MoPAs.

Main Methods:

  • Utilized the paraxial wave equation and particle-in-cell (PIC) simulations.
  • Analyzed the impact of laser and plasma parameters on pulse temporal profiles and wake generation.
  • Investigated transverse mode oscillations and Rosenbluth-Liu detuning effects.

Main Results:

  • Controlled temporal pulse profiles in P-MoPAs increased wake amplitude by up to 72% compared to plasma beat-wave accelerators.
  • Rosenbluth-Liu detuning was found to be negligible for pulse trains under ~30 pulses.
  • PIC simulations demonstrated electron energy gains of ~1.5-2.5 GeV for specific laser pulse energies.

Conclusions:

  • P-MoPAs allow for significant control over wake amplitude through modulator stage parameter adjustments.
  • The P-MoPA design mitigates detuning issues and shows potential for multi-GeV electron acceleration.
  • High-repetition-rate thin-disk lasers could drive P-MoPAs for efficient, high-throughput particle acceleration.