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Description
Laser Wakefield Acceleration (LWFA) in plasma channels offers a compact and powerful alternative to conventional radio-frequency electron accelerators. However, maintaining stable laser guiding and achieving high-quality electron beams remains a significant experimental and theoretical challenge. This study numerically investigates the use of conically tapered plasma channels as an alternative to the standard uniform cylindrical geometry for the acceleration of externally injected electron bunches.
Simulations show the narrowing geometry induces wakefield compression, substantially increasing the longitudinal accelerating field and extending the stable blowout regime. Crucially, the longitudinal plasma density gradient suppresses unwanted self-injection of background electrons, enabling precise injection control and dramatically improving beam quality.
Overall, conical channels provide enhanced energy gain, reduced energy spread, improved beam confinement and focusing, and more stable laser propagation. This validates conical channel geometry control as a highly effective tool for optimizing key performance metrics of plasma-based accelerators.
| In which format do you inted to submit your paper? | LaTeX |
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