Developing engineering model Cobra fiber positioners for the Subaru Telescope’s prime focus spectrometer
Developing engineering model Cobra fiber positioners for the Subaru Telescope’s prime focus spectrometer
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为斯巴鲁望远镜的主焦光谱仪开发工程模型 Cobra 光纤定位器
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发表时间：
2014
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通讯作者：
Eric Walkama
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作者：
C. Fisher;Chaz Morantz;D. Braun;M. Seiffert;H. Aghazarian;E. Partos;M. King;L. Hovland;M. Schwochert;Joel V. Kaluzny;Christopher M. Capocasale;A. Houck;Johannes Gross;D. Reiley;P. Mao;R. Riddle;K. Bui;D. Henderson;T. Haran;Robert Culhane;D. Piazza;Eric Walkama
眼镜蛇光纤定位器正在由加州理工学院（CIT）和喷气推进实验室（JPL）开发，用于将安装在夏威夷莫纳克亚山的斯巴鲁望远镜上的主焦点光谱仪（PFS）仪器。PFS是一种光纤馈电多目标光谱仪，它使用Cobra光纤定位器阵列快速重新配置斯巴鲁望远镜主焦点处的2394根光纤，能够将光纤定位到指定目标位置的5μm范围内。单个Cobra光纤定位器直径为7.7 mm，高115 mm。Cobra光纤定位器使用两个压电旋转电机在9.5mm直径的巡逻区域内移动光纤。在准备全面生产2550 Cobra定位器的过程中，开发、构建和测试了工程模型（EM）版本，以验证设计、降低制造成本并提高系统可靠性。EM利用了之前开发的Cobra光纤定位器原型版本。本文描述了EM Cobra光纤定位器的要求、设计、组装技术、开发测试、设计鉴定和性能评价。还讨论了使用EM构建和测试活动来验证计划于2014年底开始全面生产2550个Cobra光纤定位器的计划。
The Cobra fiber positioner is being developed by the California Institute of Technology (CIT) and the Jet Propulsion Laboratory (JPL) for the Prime Focus Spectrograph (PFS) instrument that will be installed at the Subaru Telescope on Mauna Kea, Hawaii. PFS is a fiber fed multi-object spectrometer that uses an array of Cobra fiber positioners to rapidly reconfigure 2394 optical fibers at the prime focus of the Subaru Telescope that are capable of positioning a fiber to within 5μm of a specified target location. A single Cobra fiber positioner measures 7.7mm in diameter and is 115mm tall. The Cobra fiber positioner uses two piezo-electric rotary motors to move a fiber optic anywhere in a 9.5mm diameter patrol area. In preparation for full-scale production of 2550 Cobra positioners an Engineering Model (EM) version was developed, built and tested to validate the design, reduce manufacturing costs, and improve system reliability. The EM leveraged the previously developed prototype versions of the Cobra fiber positioner. The requirements, design, assembly techniques, development testing, design qualification and performance evaluation of EM Cobra fiber positioners are described here. Also discussed is the use of the EM build and test campaign to validate the plans for full-scale production of 2550 Cobra fiber positioners scheduled to begin in late-2014.