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Thermo Yield Actuators: Nano-Adjustable Set-and-Forget Optics Mounts

机译:热屈服力执行器:纳米可调节的即插即用光学安装座

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The X-ray optics community has been developing technology for high angular resolution, large collecting area X-ray telescopes such as the Lynx X-ray telescope concept. To meet the high collecting area requirements of such telescope concepts, research is being conducted on thin, segmented optics. The mounts that fixture and align segmented optics must be the correct length to sub-micron accuracy to satisfy the angular resolution goals of such a concept. Set-and-forget adjustable length optical mounting posts have been developed to meet this need. The actuator consists of a cylinder made of metal. Halfway up the height of the metal cylinder, a reduced diameter cylindrical neck is cut. To change the length of this actuator, an axial compressive or tensile force is applied to the actuator. A high-current electrical pulse is sent through the actuator, and this electrical current resistively heats the neck of the actuator. This heating temporarily reduces the yield strength of the neck, so that the applied force plastically deforms the neck. Once the current stops and the neck cools, the neck will regain yield strength, and the plastic deformation will stop. All of the plastic deformation that occurred during heating is now permanent. Both compression and expansion of these actuators has been demonstrated in steps ranging from 6 nanometers to several microns. This paper will explain the concept of Thermo Yield actuation, explore X-ray telescope applications, describe an experimental setup, show and discuss data, and propose future ideas.
机译:X射线光学社区一直在开发用于高角度分辨率,大收集区域的X射线望远镜的技术,例如Lynx X射线望远镜的概念。为了满足这种望远镜概念的高采集面积要求,正在对薄的分段光学器件进行研究。固定和对准分段光学器件的安装座必须具有正确的长度,以达到亚微米精度,以满足这种概念的角度分辨率目标。为了满足这种需求,已经开发了可设置即忘的可调长度的光学安装柱。执行器由金属制成的圆柱体组成。在金属圆柱体高度的一半处,切出直径减小的圆柱颈。为了改变该致动器的长度,将轴向压缩力或拉力施加至致动器。大电流电脉冲通过执行器发送,该电流电阻性地加热执行器的颈部。这种加热暂时降低了颈部的屈服强度,因此施加的力使颈部塑性变形。一旦电流停止并且颈部冷却,颈部将恢复屈服强度,并且塑性变形也将停止。现在,加热过程中发生的所有塑性变形都是永久性的。这些致动器的压缩和膨胀都已在从6纳米到几微米的范围内逐步证明。本文将解释热屈服驱动的概念,探索X射线望远镜的应用,描述实验装置,显示和讨论数据,并提出未来的想法。

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