论文标题
与液压辅助驱动器紧凑的可变间隙解散器
Compact Variable-Gap Undulator with Hydraulic-Assist Driver
论文作者
论文摘要
在成功的概念验证实验之后，我们用液压辅助驱动器构建了紧凑的变化差距。 1.5m长的起伏器具有纯的永久磁铁结构，周期为28.4毫米，最小间隙为6.75mm。该设备的台式测试表明出色的机械性能和磁性性能。它显示出较大的间隙变化范围内的少于3度RMS光相误差。 〜1.0E-4（或更好）的重复性在归一化k_und（dk/k）中从一个间隙变化到另一个间隙变化； 〜1.0e-4 rms dk/k长期（〜24小时）稳定性。在特殊模式下，当差距与下降器温度的相关性变化时，解散器在5.3e-5 rms的dk/k稳定性上显示了dk/k的稳定性，而波动器温度变化约为0.4 verc。在本文中，我们讨论了开发机械稳定性和磁性性能所需的关键设计组件和标准。我们还描述了管理液压辅助驱动程序的基于实验室视图的控制系统。最后，我们提出测试设置和结果。
Following successful proof-of-concept experiments, we constructed compact varying-gap undulator with Hydraulic-Assist Driver. The 1.5m long undulator features a pure permanent magnet structure, period of 28.4 mm and a minimum gap of 6.75mm. The bench test of the device indicated excellent mechanical and magnetic performances. It demonstrated less than 3 deg RMS optical phase errors in a wide range of gap variation; ~1.0e-4 (or better) repeatability in normalized K_und (dK/K) from one gap variation to another; ~1.0e-4 RMS of dK/K long term (~24hrs) stability. In special mode, when the gap was varied in correlation with undulator temperature, undulator demonstrated dK/K stability at the level 5.3e-5 RMS while the undulator temperature change was ~0.4 degC. In this paper, we discuss the critical design components and criteria required for undulator mechanical stability and magnetic performance. We also describe our Lab-View-based control system governing the Hydraulic-Assist Driver. Finally, we present the test setup and results.
