SAP2025 - the 15th Symposium on Accelerator Physics

Energy stablization of high-charge electron bunches from Plasma Wakefield Acceleration

THMC1

4 Sept 2025, 16:00

20m

Urumqi, Xinjiang, China

Contributed Oral Presentation MC5: Novel Particle Sources Parallel Talk Session 3

Speaker

Xueyan Shi (Institute of High Energy Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences)

Description

Plasma Wakefield Acceleration (PWA) promises to reduce the scales of advanced light sources and high-energy colliders due to its ultrahigh accelerating gradients. However, the relatively large energy jitter and energy spread (typically 1~10% level) of the electron bunches generated by PWAs remain a major obstacle for practical applications. In this work, we propose two independent schemes: 1) a combination of a laser-driven active plasma dechirper and a passive plasma dechirper with two magnetic chicanes; and 2) a beam-driven active plasma dechirper integrated with a magnetic chicane. The simulation results demonstrate that these schemes can reduce both energy jitter and energy spread of PWA-generated electron beams with charges ranging from hundreds of pC to several nC from the 1% level to 0.1% or lower. In addition, we preliminarily study the transverse coordinate offsets induced by the coherent synchrotron radiation effect in chicanes, as well as the feasibility and experimental design of these schemes.