Energy Enhancement and Energy Spread Compression of Electron Beams in a Hybrid Laser-Plasma Wakefield Accelerator
2019
Ying Wu | Changhai Yu | Zhiyong Qin | Wentao Wang | Zhijun Zhang | Rong Qi | Ke Feng | Lintong Ke | Yu Chen | Cheng Wang | Xiaojun Yang | Yuxin Leng | Jiansheng Liu | Ruxin Li | Zhizhan Xu
We experimentally demonstrated the generation of narrow energy-spread electron beams with enhanced energy levels using a hybrid laser-plasma wakefield accelerator. An experiment featuring two-color electron beams showed that after the laser pump reached the depletion length, the laser-wakefield acceleration (LWFA) gradually evolved into the plasma-driven wakefield acceleration (PWFA), and thereafter, the PWFA dominated the electron acceleration. The energy spread of the electron beams was further improved by energy chirp compensation. Particle-in-cell simulations were performed to verify the experimental results. The generated monoenergetic high-energy electron beams are promising to upscale future accelerator systems and realize monoenergetic <inline-formula> <math display="inline"> <semantics> <mi mathvariant="sans-serif">γ</mi> </semantics> </math> </inline-formula>-ray sources.
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