LINAC2026 - 33rd Linear Accelerator Conference

Stable Double-Bunch Beam Generation for Plasma Wakefield Accelerators Via CSR-Tolerant Isochronous Beamlines

Not scheduled

2h

Daejeon Convention Center

Poster Presentation MC1.A01: Beam Dynamics, beam simulations, beam transport Poster Session

Speaker

Wei Li (Institute of High Energy Physics)

Description

Beam-driven plasma wakefield acceleration (PWFA) is a promising strategy for future high-energy electron–positron colliders. A critical challenge remains the generation of high-charge, highly stable double-bunch beams, as current methods often suffer from significant charge loss or charge limitations. In this paper, we propose a coherent synchrotron radiation (CSR)-free beam-merging scheme utilizing twin isochronous beamlines that share a common dipole magnet. This design enables the generation of high-charge double-bunches with superior stability. Numerical simulations demonstrate that the scheme produces a 5 nC / 1 nC electron double-bunch without charge loss. The emittance growth for both bunches is constrained to approximately 0.1 mm·mrad, while the inter-bunch timing jitter is maintained below 2 fs. We further evaluate the robustness of this scheme and highlight its potential for large-scale accelerator facilities to provide high-quality drive beams for plasma wakefield acceleration.