Characterization of radiation from a figure-8 undulator by a gas-scattering method
Characterization of radiation from a figure-8 undulator by a gas-scattering method
复制标题
采用气体散射法表征 8 字形波荡器的辐射
DOI：
10.1063/1.1305840
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发表时间：
2000
影响因子：
3.2
通讯作者：
H. Kitamura
中科院分区：
文献类型：
--
作者：
Takashi Tanaka;M. Oura;H. Ohashi;S. Goto;Yoshio Suzuki;H. Kitamura
通过气体散射方法测量了 8 字形波荡器辐射强度的绝对通量、偏振特性和空间依赖性。绝对通量测量值与计算值非常一致，并且在 6.6 keV 处测量的角发散也接近预期值。偏振测量显示线性偏振度的振荡随光子能量的变化而变化，表明水平和垂直偏振都包括在内。此外，当垂直观察角度改变时，发现偏振面发生旋转。这些偏振特性在其他传统波荡器辐射中未观察到，因此是 8 字形波荡器辐射所独有的。
The absolute flux, polarization properties, and spatial dependence of the intensity of figure-8-undulator radiation were measured by a gas-scattering method. Absolute-flux measurements were in good agreement with calculated values and the angular divergence measured at 6.6 keV was also close to expected value. Polarization measurements showed oscillations of the degree of linear polarization which varied with photon energy, indicating that both horizontal and vertical polarizations were included. In addition, the polarization plane was found to rotate when the vertical observation angle was changed. These polarization characteristics are not observed in other conventional-undulator radiation and thus unique to figure-8-undulator radiation.