光栅轮组件传感器的在轨性能与定标(NIRSpec/JWST)
天体物理仪器与方法
2022-08-11 v1
摘要
詹姆斯·韦伯空间望远镜上的近红外光谱仪(NIRSpec)将是太空中首台多目标光谱仪,提供约250,000个可配置微快门,并配备积分视场单元与固定狭缝。NIRSpec光栅轮组件(GWA)是其核心,为一种低温机构,装备六块色散光栅、一块棱镜与一面反射镜。轮的角定位重复性有限,导致焦平面上光束发生微小但可测量的位移,使静态预测光路不可行。为此,使用两个磁阻位置传感器在每次轮转动时测量所选GWA元件的倾斜与俯仰位移。这些传感器的定标是基于模型的NIRSpec定标、谱提取与微快门目标放置方法的关键组成部分。本文给出GWA传感器从地面到空间环境性能与定标演变的结果。
引用
@article{arxiv.2208.05354,
title = {In-flight performance and calibration of the Grating Wheel Assembly sensors (NIRSpec/JWST)},
author = {Catarina Alves de Oliveira and Nora Luetzgendorf and Peter Zeidler and Giovanna Giardino and Pierre Ferruit and Nimisha Kumari and Timothy Rawle and Stephan M. Birkmann and Torsten Boeker and Charles Proffitt and Marco Sirianni and Maurice Te Plate},
journal= {arXiv preprint arXiv:2208.05354},
year = {2022}
}
备注
To appear in Proceedings of SPIE conference "Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave"