Alignment of the VISA undulator
Alignment of the VISA undulator
复制标题
VISA 波动器的对准
DOI：
10.1109/pac.1999.795558
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
M. Libkind
中科院分区：
文献类型：
--
作者：
R. Ruland;D. Arnett;G. Bowden;R. Carr;B. Dix;B. Fuss;C. Le Cocq;Z. Wolf;J. Aspenleiter;G. Rakowsky;J. Skaritka;P. Duffy;M. Libkind
可见-红外SASE放大器（VISA）波荡器由四个99 cm长的段组成。每个波荡器段设置在脉冲线工作台上，以表征FODO阵列的磁特性并定位其磁轴。随后，通过直线度干涉仪将由导线限定的磁轴的位置参考每个磁体段上的工具球。在安装在真空室中之后，四个磁体段相对于其自身并且整体地与光束线参考激光器对准。一个专门设计的对准夹具用于安装一个直线度干涉仪在梁的水平和垂直平面。这些程序的目标是将由磁误差和对准误差引起的组合均方根轨迹误差保持在50 /spl mu/m。
The Visible-Infrared SASE Amplifier (VISA) undulator consists of four 99 cm long segments. Each undulator segment is set up on a pulsed-wire bench, to characterize the magnetic properties and to locate the magnetic axis of the FODO array. Subsequently, the location of the magnetic axis, as defined by the wire, is referenced to tooling balls on each magnet segment by means of a straightness interferometer. After installation in the vacuum chamber, the four magnet segments are aligned with respect to themselves and globally to the beam line reference laser. A specially designed alignment fixture is used to mount one straightness interferometer each in the horizontal and vertical plane of the beam. The goal of these procedures is to keep the combined rms trajectory error, due to magnetic and alignment errors, to 50 /spl mu/m.