Pereira N R, Presura R, Wallace M, Kastengren A
Ecopulse, Inc., 7884 Vervain Ct, Springfield, Virginia 22152, USA.
Physics Department, University of Nevada, Reno 89557, USA.
Rev Sci Instrum. 2014 Jul;85(7):073503. doi: 10.1063/1.4890336.
In hexagonal crystals such as quartz, an asymmetric Bragg reflection from two equivalent internal crystal planes can separate unpolarized x-rays into two linearly polarized components. The perfectly polarized and tunable x-rays from a synchrotron are ideal to evaluate polarization spitting in detail. One unanticipated feature is that additional reflections from the crystal affect the diffraction intensity of the two polarized components, an effect that is unlikely to matter in polarization spectroscopy of radiating plasmas for which the crystal is intended.
在诸如石英的六方晶体中，来自两个等效内部晶面的不对称布拉格反射可将非偏振X射线分离为两个线偏振分量。来自同步加速器的完全偏振且可调谐的X射线是详细评估偏振分裂的理想选择。一个意外的特征是，晶体的额外反射会影响两个偏振分量的衍射强度，这种效应在该晶体所适用的辐射等离子体的偏振光谱中可能无关紧要。
