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Comparison study on first bunch compressor schemes by conventional and double C-chicane for MaRIE XFEL

arXiv (Cornell University)(2022)

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Abstract
We report our comparison study on the first stage electron bunch compression schemes at 750 MeV using a conventional and a double C-chicane for the X-ray free electron laser (XFEL) under development for the Matter-Radiation Interactions in Extremes (MaRIE) project at Los Alamos National Laboratory. Compared to the performance of the conventional C-chicane bunch compressor, the double C-chicane scheme exhibits the capability of utilizing the transverse momentum shift induced by the coherent synchrotron radiation (CSR) in the second C-chicane to compensate that generated in the first C-chicane, resulting in a compressed electron bunch with minimized transverse momentum along the beam. It is also found that the double C-chicane scheme can be designed to significantly better preserve the beam emittance in the course of the bunch compression. This is particularly beneficial for the MaRIE XFEL whose lasing performance critically depends on the preservation of the ultralow beam emittance.
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first bunch compressor schemes,marie xfel,c-chicane
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要点】:本文对比研究了常规C-chicane与双C-chicane方案在MaRIE XFEL项目中用于750 MeV电子束的第一阶段压缩效果,发现双C-chicane方案能更有效利用CSR诱导的横向动量变化,从而优化束流品质。

方法】:通过模拟计算,比较了常规C-chicane和双C-chicane两种方案在束流压缩过程中的性能。

实验】:未明确提及具体实验,但研究基于模拟计算,使用的数据集为MaRIE XFEL项目的束流参数,结果显示双C-chicane方案在保持束流发射度方面表现出显著优势。