Several research groups have now succeeded in achieving lasing in free-electron lasers (FELs) driven by compact plasma wakefield accelerators. In the future, the approach may ultimately lead to a new breed of much smaller, more affordable FELs.

中文翻译：

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尾流驱动的 FEL 竞赛

几个研究小组现在已经成功地实现了由紧凑型等离子体尾场加速器驱动的自由电子激光器 (FEL) 的激光发射。在未来，这种方法最终可能会导致一种更小、更实惠的新型 FEL。