Beam-driven collinear wakefield accelerators (CWAs) that operate by using slow-wave structures or plasmas hold great promise toward reducing the size of contemporary accelerators. Sustainable acceleration of charged particles to high energies in the CWA relies on using field-generating relativistic electron bunches with a highly asymmetric current profile and a large energy chirp. A new approach to obtaining such bunches has been proposed and illustrated with the accelerator design supported by particle tracking simulations. It has been shown that the required particle distribution in the longitudinal phase space can be obtained without collimators, giving CWAs an opportunity for employment in applications requiring a high repetition rate of operation.

中文翻译：

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束驱动共线尾波加速器的时间形电子束的形成

通过使用慢波结构或等离子体运行的束驱动共线尾场加速器（CWA）有望减小现代加速器的尺寸。CWA中带电粒子向高能量的可持续加速依赖于使用场产生相对论电子束，该束具有高度不对称的电流分布和大的chi。已经提出了一种获得这种束的新方法，并通过粒子跟踪仿真支持的加速器设计进行了说明。已经表明，在没有准直仪的情况下，可以在纵向相空间中获得所需的颗粒分布，从而为CWA提供了在需要高重复操作率的应用中使用的机会。