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Developments in high-density Cobra fiber positioners for the Subaru Telescope’s Prime Focus Spectrometer

机译:斯巴鲁望远镜的Prime Focus光谱仪的高密度眼镜蛇光纤定位器的发展

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摘要

The Prime Focus Spectrograph (PFS) is a fiber fed multi-object spectrometer for the Subaru Telescope that will conduct a variety of targeted surveys for studies of dark energy, galaxy evolution, and galactic archaeology. The key to the instrument is a high density array of fiber positioners placed at the prime focus of the Subaru Telescope. The system, nicknamed “Cobra”, will be capable of rapidly reconfiguring the array of 2394 optical fibers to the image positions of astronomical targets in the focal plane with high accuracy. The system uses 2394 individual “SCARA robot” mechanisms that are 7.7mm in diameter and use 2 piezo-electric rotary motors to individually position each of the optical fibers within its patrol region. Testing demonstrates that the Cobra positioner can be moved to within 5μm of an astronomical target in 6 move iterations with a success rate of 95%. The Cobra system is a key aspect of PFS that will enable its unprecedented combination of high-multiplex factor and observing efficiency on the Subaru telescope. The requirements, design, and prototyping efforts for the fiber positioner system for the PFS are described here as are the plans for modular construction, assembly, integration, functional testing, and performance validation.
机译:Prime Focus光谱仪(PFS)是用于斯巴鲁望远镜的光纤馈送多目标光谱仪,它将进行各种针对性研究,以研究暗能量,星系演化和银河考古学。仪器的关键是将高密度的光纤定位器阵列放置在Subaru望远镜的主要焦点上。该系统绰号为“眼镜蛇”,将能够以高精度将2394光纤阵列快速重新配置为焦平面中天文目标的图像位置。该系统使用2394个直径为7.7mm的“ SCARA机械手”机构,并使用2个压电旋转电机分别将每个光纤放置在其巡逻区内。测试表明,Cobra定位器可以通过6次移动迭代移动到距离天文目标5μm的范围内,成功率为95%。眼镜蛇系统是PFS的关键方面,它将使它的高倍数因子和斯巴鲁望远镜的观测效率实现空前的结合。这里描述了用于PFS的光纤定位器系统的要求,设计和原型设计工作,以及模块化构造,组装,集成,功能测试和性能验证的计划。

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