Over the past decade, several X-ray free-electron laser (XFEL) facilities have been constructed and started operation worldwide. New, high-repetition XFELs are expected to open to users in the next 5 years.

中文翻译：

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XFEL的头十年

在过去的十年中，已经建造了多个X射线自由电子激光（XFEL）设施并开始在全球范围内运行。新的，高重复性的XFEL有望在未来5年内向用户开放。