Bandler Simon R, Chervenak James A, Datesman Aaron M, Devasia Archana M, DiPirro Michael, Sakai Kazuhiro, Smith Stephen J, Stevenson Thomas R, Yoon Wonsik, Bennett Douglas, Mates Benjamin, Swetz Daniel, Ullom Joel N, Irwin Kent D, Eckart Megan E, Figueroa-Feliciano Enectali, McCammon Dan, Ryu Kevin, Olson Jeffrey, Zeiger Ben
NASA Goddard Space Flight Center, Greenbelt, Maryland, United States.
Wyle Information Systems, McLean, Virginia, United States.
J Astron Telesc Instrum Syst. 2019 Apr;5(2):021017. doi: 10.1117/1.JATIS.5.2.021017. Epub 2019 May 31.
Lynx is an x-ray telescope, one of four large satellite mission concepts currently being studied by NASA to be a flagship mission. One of Lynx's three instruments is an imaging spectrometer called the Lynx x-ray microcalorimeter (LXM), an x-ray microcalorimeter behind an x-ray optic with an angular resolution of 0.5 arc sec and ∼2 m of area at 1 keV. The LXM will provide unparalleled diagnostics of distant extended structures and, in particular, will allow the detailed study of the role of cosmic feedback in the evolution of the Universe. We discuss the baseline design of LXM and some parallel approaches for some of the key technologies. The baseline sensor technology uses transition-edge sensors, but we also consider an alternative approach using metallic magnetic calorimeters. We discuss the requirements for the instrument, the pixel layout, and the baseline readout design, which uses microwave superconducting quantum interference devices and high-electron mobility transistor amplifiers and the cryogenic cooling requirements and strategy for meeting these requirements. For each of these technologies, we discuss the current technology readiness level and our strategy for advancing them to be ready for flight. We also describe the current system design, including the block diagram, and our estimate for the mass, power, and data rate of the instrument.
天猫座是一台X射线望远镜，是美国国家航空航天局目前正在研究的四个大型卫星任务概念之一，旨在打造一项旗舰任务。天猫座的三种仪器之一是一种成像光谱仪，称为天猫座X射线微量热计（LXM），它是一种位于X射线光学器件后面的X射线微量热计，在1千电子伏特时角分辨率为0.5角秒，面积约为2平方米。LXM将提供对遥远扩展结构无与伦比的诊断，特别是将允许详细研究宇宙反馈在宇宙演化中的作用。我们讨论了LXM的基线设计以及一些关键技术的并行方法。基线传感器技术使用过渡边缘传感器，但我们也考虑了使用金属磁热计的替代方法。我们讨论了仪器的要求、像素布局和基线读出设计，该设计使用微波超导量子干涉器件和高电子迁移率晶体管放大器以及低温冷却要求和满足这些要求的策略。对于这些技术中的每一项，我们讨论了当前的技术就绪水平以及将它们推进到可用于飞行状态的策略。我们还描述了当前的系统设计，包括方框图，以及我们对仪器质量、功率和数据速率的估计。
