论文标题
巨型麦哲伦望远镜的21,000执行器EXAO系统的光学和机械设计：Gmagao-X
The Optical and Mechanical Design for the 21,000 Actuator ExAO System for the Giant Magellan Telescope: GMagAO-X
论文作者
论文摘要
GMAGAO-X是GMT 2540万的近第一光埃克斯冠状动脉仪器。它是为GMT折叠端口上的一个插槽而设计的。为了满足严格的EXAO拟合和伺服误差要求（<90nm RMS WFE），Gmagao-X必须具有21,000个执行器DM，能够> 2KHz校正速度。为了最大程度地减少波前/段活塞误差gmagao-X在振动隔离台上具有干涉梁组合仪，这是“ 21,000个执行器并行DM”的一部分。活塞误差通过全息散布的边缘传感器（HDFS）感知。除了冠状动脉外，它还具有后lyot lyot低阶WFS（llowfs），以感知非常见路径（NCP）错误。 LLOWFS驱动非通用路径DM（NCP DM）纠正这些NCP错误。 Gmagao-X在可见的和/或NIR中获得了高对比度的科学和波前传感。在这里，我们介绍了我们成功的外部审查（2021年9月）CODR光学机械设计，该设计满足Gmagao-X的顶级科学要求，并且符合GMT仪器的要求，并且仅需要COTS零件。
GMagAO-X is the near first light ExAO coronagraphic instrument for the 25.4m GMT. It is designed for a slot on the folded port of the GMT. To meet the strict ExAO fitting and servo error requirement (<90nm rms WFE), GMagAO-X must have 21,000 actuator DM capable of >2KHz correction speeds. To minimize wavefront/segment piston error GMagAO-X has an interferometric beam combiner on a vibration isolated table, as part of this "21,000 actuator parallel DM". Piston errors are sensed by a Holographic Dispersed Fringe Sensor (HDFS). In addition to a coronagraph, it has a post-coronagraphic Lyot Low Order WFS (LLOWFS) to sense non-common path (NCP) errors. The LLOWFS drives a non-common path DM (NCP DM) to correct those NCP errors. GMagAO-X obtains high-contrast science and wavefront sensing in the visible and/or the NIR. Here we present our successful externally reviewed (Sept. 2021) CoDR optical-mechanical design that satisfies GMagAO-X's top-level science requirements and is compliant with the GMT instrument requirements and only requires COTS parts.
