A W：用于软X射线辐射宽带偏振分析的B4C多层相位延迟器。
A W: B4C multilayer phase retarder for broadband polarization analysis of soft x-ray radiation.
作者信息
MacDonald Michael A, Schaefers Franz, Pohl Ralph, Poole Ian B, Gaupp Andreas, Quinn Frances M
机构信息
STFC Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom.
出版信息
Rev Sci Instrum. 2008 Feb;79(2 Pt 1):025108. doi: 10.1063/1.2841803.
A W
B4C multilayer phase retarder has been designed and characterized which shows a nearly constant phase retardance between 640 and 850 eV photon energies when operated near the Bragg condition. This freestanding transmission multilayer was used successfully to determine, for the first time, the full polarization vector at soft x-ray energies above 600 eV, which was not possible before due to the lack of suitable optical elements. Thus, quantitative polarimetry is now possible at the 2p edges of the magnetic substances Fe, Co, and Ni for the benefit of magnetic circular dichroism spectroscopy employing circularly polarized synchrotron radiation.
A W
已经设计并表征了B4C多层相位延迟器，当在布拉格条件附近操作时，它在640至850 eV光子能量之间显示出几乎恒定的相位延迟。这种独立式透射多层膜首次成功用于确定600 eV以上软X射线能量处的完整偏振矢量，由于缺乏合适的光学元件，此前这是不可能的。因此，现在在磁性物质铁、钴和镍的2p边缘进行定量偏振测量成为可能，这有利于采用圆偏振同步辐射的磁圆二色光谱学。
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