研究目的
Investigating the effect of the laser transverse profile in a capillary for laser-plasma acceleration with external injection.
研究成果
The study demonstrates that using a flattened Gaussian laser profile can suppress diffraction at the capillary entrance, leading to efficient acceleration of an electron bunch over several Rayleigh lengths. The best performance is achieved with higher-order flattened Gaussian beams, which are close to the Airy case.
研究不足
The study is based on numerical simulations and may not fully capture all physical phenomena present in actual experiments. The effects of higher-order modes and nonlinear interactions are not fully explored.
1：Experimental Design and Method Selection:
The study involves numerical simulations of laser propagation and electron acceleration using the WAKE-EP code. The laser parameters are based on the properties of the
2：8 μm Ti:
sapphire laser system LASERIX.
3：Sample Selection and Data Sources:
The study focuses on the acceleration of an electron bunch injected at 100 MeV in the plasma wakefield excited inside a capillary tube.
4：List of Experimental Equipment and Materials:
The laser system used is a
5：8 μm Ti:
sapphire laser with a FWHM duration of 45fs and a maximum power of
6：75 TW. Experimental Procedures and Operational Workflow:
The laser is focused to a waist wG.f =
7：46 μm yielding a Rayleigh length ZR = 1 cm. The electron bunch is matched with the corresponding plasma wakefield at the capillary entrance. Data Analysis Methods:
The evolution of the number of trapped electrons, the phase space evolution of the injected electrons, and the evolution of the bunch emittance are analyzed.
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