Polarization characterization of circularly polarized vacuum‐ultraviolet and soft‐x‐ray helical undulator radiation
Polarization characterization of circularly polarized vacuum‐ultraviolet and soft‐x‐ray helical undulator radiation
复制标题
圆偏振真空紫外和软x射线螺旋波荡器辐射的偏振表征
DOI：
10.1063/1.1145759
复制
发表时间：
1995
影响因子：
1.6
通讯作者：
M. Yuri
中科院分区：
文献类型：
--
作者：
T. Koide;T. Shidara;T. Miyahara;M. Yuri
A vacuum‐compatible reflection polarimeter has been designed and constructed for monitoring the polarization state of circularly polarized radiation from a helical undulator installed on beamline BL‐28A at the Photon Factory. The rotational axis of the polarimeter can be adjusted to coincide with the axis of the monochromatized beam. The polarimeter was used to measure the Stokes parameters of the beam emerging from BL‐28A at given energies in the 50–80 eV region with the first‐harmonic‐peak energy of undulator radiation kept at ∼75 eV. Numerical calculations were also made by considering the undulator‐radiation characteristics and further by taking into account the effects on the polarization of the beamline optics and of the mixing of bending‐magnet radiation. Comparison of the experimental results with the calculations is given.
