Design of a Theta/Phi fiber positioner robot for the Sloan Digital Sky Survey V
Design of a Theta/Phi fiber positioner robot for the Sloan Digital Sky Survey V
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用于斯隆数字巡天 V 的 Theta/Phi 光纤定位机器人设计
DOI：
10.1117/12.2563234
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Pogge, Richard W.
中科院分区：
文献类型：
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作者：
Araujo, Ricardo;Bouri, Mohamed;Brandon, Christopher;Caseiro, Stefane;Gillet, Denis;Grossen, Loïc;Kronig, Luzius;Macktoobian, Matin;O'Brien, Thomas P.;Pogge, Richard W.
斯隆数字巡天五号（SDSS-V）是一个全天空光谱巡天，观测超过600万个天体，旨在解码银河系的历史，揭示恒星的内部运作，调查太阳系的起源，并跟踪宇宙中超大质量黑洞的生长。1本文描述了theta/φ光纤定位器机器人正在生产中，将集成在SDSS-V望远镜的焦平面系统（FPS）中。对于每个安装，正在制造500个机器人，已经从制造商那里收到了800多个机器人并进行了验证。机械，电子和固件的设计，目前的文件中详细介绍。我们将公开原型的不同迭代，这些原型是经过开发、构建和测试的，最终可以实现满足所需科学要求的最终版本。光纤定位器机器人携带集成到单个雪花套圈中的3根光纤。其中两根光纤是连接到两台不同光谱仪的科学光纤，第三根光纤用于计量。该机器人能够在直径为44.8mm的工作空间内进行第一次盲移动，以优于50微米的平面精度定位光纤。利用互补光纤观察摄像机（FVC）和背光计量光纤执行一些小的校正移动，定位器可以在光纤位置上达到亚5微米的精度。
The Sloan Digital Sky Survey V (SDSS-V) is an all-sky spectroscopic survey of > 6 million objects, designed to decode the history of the Milky Way, reveal the inner workings of stars, investigate the origin of solar systems, and track the growth of supermassive black holes across the Universe.1 This paper describes the design of the theta/phi fiber positioner robots that are being produced to be integrated in the Focal Plane System (FPS) of the SDSS-V telescopes. For each installation, 500 robots are being manufactured, more than 800 units have already been received from the manufacturer and validated. Mechanical, electronic and firmware designs are presented in the current paper in detail. We will expose the different iterations of the prototypes that were developed, built and tested and ultimately allowed to achieve the end version that meets the requested science requirements. The fiber positioner robot is carrying 3 optical fibers integrated into a single snowflake ferrule. Two of the fibers are science fibers connected to two different spectrographs, and the third fiber is used for metrology. The robot is capable of positioning the fibers with a planar accuracy better than 50 microns with a first blind move within its workspace of a diameter of 44.8mm. With a complementary fiber viewing camera (FVC) and the backlighted metrology fiber to perform a few small corrections moves, the positioner can reach a sub 5-micron precision on the fiber position.