Development of multi-polarization-mode undulator
Development of multi-polarization-mode undulator
复制标题
多极化模式波荡器的研制
DOI：
10.1063/1.1757769
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
H. Kitamura
中科院分区：
文献类型：
--
作者：
K. Shirasawa;T. Tanaka;T. Seike;A. Hiraya;H. Kitamura
针对SPring - 8的软X射线光束线BL17SU，开发了一种新的波动器。在BL17SU上进行的实验需要线性/圆偏振光和圆偏振光的快速螺旋开关。此外，它必须在轴上具有低功率密度，以避免热负荷问题。因此，该波动器具有三种工作模式；它可以作为圆偏振光的螺旋波动器，线性偏振光的图8波动器和快速螺旋开关的非对称图8波动器。为了实现三种类型的波动器，新型波动器由电磁铁和永磁体组成。对各工作模式下的磁场进行了测量，并根据测量结果计算了其性能。
A novel undulator has been developed for the soft X‐ray beamline BL17SU of SPring‐8. Experiments to be done at the BL17SU require linearly/circularly polarized light and fast helicity switching of circular polarized light. In addition, it must have low power density on axis to avoid a heat load problem. Therefore, the undulator has three operation modes; it works as a helical undulator for circular polarized light, figure‐8 undulator for linear polarized light and asymmetric figure‐8 undulator for fast helicity switching. In order to realize three types of undulator, the novel undulator consists of electromagnets and permanent magnets. The magnetic field has been measured at each operation mode and performances have been calculated from the measurement results.