Keck adaptive optics facility: real time controller upgrade

Keck adaptive optics facility: real time controller upgrade
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Keck 自适应光学设施:实时控制器升级

DOI:
10.1117/12.2629614
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发表时间:
2022
期刊:
SPIE Astronomical Telescopes + Instrumentation
影响因子:
--
通讯作者:
Biasi, Roberto
Biasi, Roberto
中科院分区:
--
文献类型:
--
作者:
Chin, Jason C.;Cetre, Sylvain;Wizinowich, Peter;Ragland, Sam;Lilley, Scott J.;Wetherell, Ed;Surendran, Avinash;Correia, Carlos M.;Marin, Eduardo;Biasi, Roberto

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世贸M.自2007年以来,凯克天文台自适应光学(AO)设施一直使用基于现场可编程门阵列(FPGA)的真实的时间控制器(RTC)。RTC输入来自各种AO波前和倾斜/倾斜传感器的数据,并通过可变形和倾斜/倾斜反射镜校正大气湍流造成的图像模糊。自投入使用以来,Keck I和Keck II RTC已经升级,以支持新的硬件,如金字塔波前和红外倾斜传感器。然而,它们在处理带宽和与新硬件接口的能力方面正在达到其能力的极限。与Keck全天空精密自适应光学(KAPA)项目一起,需要更高性能和更可靠的RTC来支持下一代功能,如激光断层扫描和传感器融合。本文概述了与我们的承包商/合作者(Microgate,Swinburne University of Technology和澳大利亚国立大学)开发的新RTC系统,以及初始的天空性能。升级包括一个接口模块,用于与波前传感器和受控硬件进行接口,以及一个基于图形处理单元(GPU)的计算引擎,以满足系统的控制要求,并提供灵活的软件架构,以允许未来的算法开发和功能。该系统于2021年首次亮相,并将于2022年投入使用,以支持单共轭激光引导星星(LGS)AO,沿着更灵敏的EMCCD相机。初步结果表明,单一的NGS和LGS的性能,系统的可靠性,并计划升级为四个LGS,以支持激光断层扫描。
The W. M. Keck Observatory Adaptive Optics (AO) facilities have been operating with a Field Programmable Gate Array (FPGA) based real time controller (RTC) since 2007. The RTC inputs data from various AO wavefront and tip/tilt sensors; and corrects image blurring from atmospheric turbulence via deformable and tip/tilt mirrors. Since its commissioning, the Keck I and Keck II RTCs have been upgraded to support new hardware such as pyramid wavefront and infrared tip-tilt sensors. However, they are reaching the limits of their capabilities in terms of processing bandwidth and the ability to interface with new hardware. Together with the Keck All-sky Precision Adaptive optics (KAPA) project, a higher performance and a more reliable RTC is needed to support next generation capabilities such as laser tomography and sensor fusion. This paper provides an overview of the new RTC system, developed with our contractor/collaborators (Microgate, Swinburne University of Technology and Australian National University), and the initial on-sky performance. The upgrade includes an Interface Module to interface with the wavefront sensors and controlled hardware, and a Graphical Processing Unit (GPU) based computational engine to meet the system’s control requirements and to provide a flexible software architecture to allow future algorithms development and capabilities. The system saw first light in 2021 and is being commissioned in 2022 to support single conjugate laser guide star (LGS) AO, along with a more sensitive EMCCD camera. Initial results are provided to demonstrate single NGS & LGS performance, system reliability, and the planned upgrade for four LGS to support laser tomography.
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DOI: --
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期刊: Astronomical Telescopes + Instrumentation
影响因子: --
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发表时间: 2020
期刊: Journal of Astronomical Telescopes, Instruments, and Systems
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DOI: --
发表时间: 2016
期刊: Astronomical Telescopes + Instrumentation
影响因子: --
作者:
B. Femenía Castellá;P. Wizinowich;R. Rampy;S. Cetre;S. Lilley;J. Lyke;S. Ragland;P. Stomski;M. V. van Dam
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