Constructing vacuum‐ultraviolet beamlines at synchrotron radiation facilities with giga‐electron volt storage ring results in serious heat load on the beamlines which can reduce their performance. To solve this problem, an APPLE‐Knot undulator with eight magnet rows has been built at the Shanghai Synchrotron Radiation Facility and has achieved very good performance. However, its performance in vertical polarization mode is imperfect. Here, a new configuration of a magnet‐merged APPLE‐Knot undulator that has achieved a better performance is reported.

中文翻译：

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新型合并的APPLE-Knot起伏器的实用设计和性能

在具有千兆电子伏特存储环的同步加速器辐射设施上建造真空-紫外线束线会导致束线上的热负荷严重，从而降低其性能。为解决这个问题，上海同步辐射装置已制造出带有八排磁铁的APPLE-结波状起伏器，并取得了很好的性能。但是，其在垂直极化模式下的性能并不理想。在此，报告了一种新的磁体合并式APPLE结型波荡器配置，该配置已取得了更好的性能。