Energy Compression and Stabilization of Laser-Plasma Accelerators.

Area of Science:

• Physics
• Accelerator Technology
• Plasma Physics

Background:

• Laser-plasma accelerators offer superior acceleration gradients compared to radio frequency technology.
• Achieving high beam quality, specifically low energy spread and high stability, is a critical challenge for laser-plasma accelerators.
• Demanding applications require beam quality comparable to conventional acceleration schemes.

Purpose of the Study:

• To propose and validate novel post-acceleration techniques for enhancing laser-plasma accelerator beam quality.
• To significantly reduce the energy spread and energy jitter of particle beams.
• To bridge the beam-quality gap between laser-plasma and conventional accelerators.

Main Methods:

• Combining bunch decompression and active plasma dechirping techniques.
• Utilizing realistic start-to-end simulations to model the proposed methods.
• Implementing post-acceleration phase-space manipulations.

Main Results:

• Demonstrated drastic improvement in the energy profile and stability of accelerated beams.
• Reduced initial energy spread and energy jitter from approximately 1-2% to below 0.1%.
• Validated the effectiveness of the proposed combined techniques through simulations.

Conclusions:

• The combination of bunch decompression and active plasma dechirping is a viable strategy for enhancing laser-plasma accelerator performance.
• These post-acceleration manipulations can significantly improve beam quality, making laser-plasma accelerators more suitable for demanding applications.
• The proposed methods effectively close the beam-quality gap to conventional acceleration schemes.