用于离面光栅火箭实验的线扩展函数综合误差估计
A Comprehensive Line-Spread Function Error Budget for the Off-Plane Grating Rocket Experiment
摘要：
离面光栅火箭实验（OGRE）是一个软X射线光栅光谱仪，将在亚轨道火箭上飞行。有效载荷的设计目的是获得迄今为止最高分辨率的五车二软X射线光谱，在其10- 55埃感兴趣的带通中的选定波长处的分辨率目标为$R(λ/Δλ)>2000$。光谱仪的光学设计实现了$R\approx5000$的理论最大分辨率，但该性能没有考虑单个光谱仪组件的有限性能、组件之间的未对准和飞行中的指向误差。这些误差都使光谱仪的性能从其理论最大值降级。一个全面的线扩展函数（LSF）的误差预算已被构造为OGRE光谱仪，以确定对LSF的贡献，以确定这些如何影响LSF，并告知光谱仪的性能要求和对准公差。在本文中，全面的OGRE光谱仪的LSF误差预算，所产生的误差进行了验证，通过光线跟踪模拟，并讨论了这些结果的影响。
英文摘要：
The Off-plane Grating Rocket Experiment (OGRE) is a soft X-ray grating spectrometer to be flown on a suborbital rocket. The payload is designed to obtain the highest-resolution soft X-ray spectrum of Capella to date with a resolution goal of $R(λ/Δλ)>2000$ at select wavelengths in its 10--55 Angstrom bandpass of interest. The optical design of the spectrometer realizes a theoretical maximum resolution of $R\approx5000$, but this performance does not consider the finite performance of the individual spectrometer components, misalignments between components, and in-flight pointing errors. These errors all degrade the performance of the spectrometer from its theoretical maximum. A comprehensive line-spread function (LSF) error budget has been constructed for the OGRE spectrometer to identify contributions to the LSF, to determine how each of these affects the LSF, and to inform performance requirements and alignment tolerances for the spectrometer. In this document, the comprehensive LSF error budget for the OGRE spectrometer is presented, the resulting errors are validated via raytrace simulations, and the implications of these results are discussed.
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