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Deep multilayer gratings with adjustable bandpass for XRF spectroscopy

机译：具有可调带通功能的深层多层光栅，用于XRF光谱

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摘要

We propose here a deep multilayer grating with adjustable bandpass as an alternative dispersing element to PET crystal in WDXRF spectroscopy. When making a multilayer grating, we remove part of the reflecting planes of a multilayer, allowing radiation to penetrate deeper. Since the resolution, or the bandpass, is reciprocally proportional to the penetration depth, we improve the resolution and reduce the bandpass of a simple multilayer mirror without affecting the reflectivity. By changing the grating land/period ratio, the amount of the removed material can be continuously varied and, thus, the extinction depth and the bandpass, or resolution, can be continuously varied. In this way we can find an optimum between required resolution and flux for a particular application. Retaining all the advantages of multilayer mirrors, such as stability to moisture and heating, multilayer gratings allow improving resolution of multilayers and making their performance comparable to PET crystals.
机译：我们在这里提出一种具有可调带通的深层多层光栅，作为WDXRF光谱中PET晶体的替代色散元素。制作多层光栅时，我们去除了多层反射面的一部分，使辐射更深地穿透。由于分辨率或带通与穿透深度成反比，因此我们提高了分辨率并减少了简单多层镜的带通，而不会影响反射率。通过改变光栅的脊/周期比，去除的材料的量可以连续变化，因此消光深度和带通或分辨率可以连续变化。这样，我们可以在特定应用的所需分辨率和通量之间找到最佳值。多层光栅保留了多层反射镜的所有优点，例如对水分和热的稳定性，因此可以提高多层分辨率，并使它们的性能与PET晶体相当。

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