FLASH的单色光束线：性能、能力和升级计划
The monochromator beamline at FLASH: performance, capabilities and upgrade plans
摘要：
DESY的FLASH设施中的单色光束线是世界上第一条在自由电子激光（FEL）源上运行的XUV单色光束线。作为一个单用户的机器，FLASH需要一个高灵活性的仪器，以满足不同的实验需求进行了多学科的用户社区。因此，光束线不仅被用于高分辨率光谱，它最初被设计，而且用于泵浦探测实验控制的时间光谱特性在中等分辨率，并作为一个过滤器的高谐波的自由电子激光在非常低的分辨率。目前的性能和能力的光束线进行了讨论，重点从自由电子激光源的性质所产生的特殊性，目前的发展，旨在提高其能力，以适应各种各样的实验。
英文摘要：
The monochromator beamline at the FLASH facility at DESY is the worldwide first XUV monochromator beamline operational on a free electron laser (FEL)source. Being a single-user machine, FLASH demands a high flexibility of the instrumentation to fulfil the needs of diverse experiments performed by a multidisciplinary user community. Thus, the beamline has not only been used for high-resolution spectroscopy that it was originally designed for, but also for pump-probe experiments controlling the temporal-spectral properties at moderate resolution, and as a filter for high harmonics of the FEL at very low resolution. The present performance and capabilities of the beamline are discussed with emphasis on particularities arising from the nature of the FEL source, and current developments are presented aiming to enhance its capabilities for accommodating a wide variety of experiments.
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