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首页> 外文会议>UV and Gamma-Ray Space Telescope Systems pt.2 >The Constellation-X RGS options: Raytrace Modeling of the Off-plane Gratings
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The Constellation-X RGS options: Raytrace Modeling of the Off-plane Gratings

机译：Constellation-X RGS选项：平面光栅的光线跟踪建模

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The Reflection Grating Spectrometer of the Constellation-X mission has two strong candidate configurations. The first configuration, the in-plane grating (IPG), is a set of reflection gratings similar to those flown on XMM-Newton and has grooves perpendicular to the direction of incident light. In the second configuration, the off-plane grating (OPG), the grooves are closer to being parallel to the incident light, and diffract along a cone. It has advantages of higher packing density, and higher reflectivity. Confinement of these gratings to sub-apertures of the optic allow high spectral resolution. We have developed a raytrace model and analysis technique for the off-plane grating configuration. Initial estimates indicate that first order resolving powers in excess of 1000 (defined with half-energy width) are achievable for sufficiently long wavelengths (λ approx> 12 A), provided separate accommodation is made for gratings in the subaperture region farther from the zeroth order location.
机译：Constellation-X任务的反射光栅光谱仪具有两种强大的候选配置。第一种配置是平面内光栅（IPG），它是一组类似于在XMM-Newton上流动的反射光栅的反射光栅，并且具有垂直于入射光方向的凹槽。在第二配置中，离面光栅（OPG），凹槽更接近于平行于入射光，并且沿着圆锥形衍射。它具有较高的堆积密度和较高的反射率的优点。将这些光栅限制在光学元件的子孔径上可以实现高光谱分辨率。我们已经开发了用于平面外光栅配置的光线跟踪模型和分析技术。初步估计表明，对于足够长的波长（λ约> 12 A），只要为子孔径区域中距零阶更远的光栅提供单独的容纳，就可以实现超过1000的一阶分辨能力（用半能量宽度定义）。位置。

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