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Sub-nanoradiant beam pointing monitoring and stabilization system for controlling input beam jitter in gravitational wave interferometers

机译：用于控制重力波干涉仪中输入光束抖动的亚纳米辐射光束指向监测和稳定系统

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摘要

In this paper, a simple and effective control system to monitor and suppress the beam jitter noise at the input of an optical system, called a beam pointing control (BPC) system, will be described, showing the theoretical principle and an experimental demonstration for the application of large-scale gravitational wave (GW) interferometers (ITFs), in particular for the Advanced Virgo detector. For this purpose, the requirements for the control accuracy and the sensing noise will be computed by taking into account the Advanced Virgo optical configuration, and the outcomes will be compared with the experimental measurement obtained in the laboratory. The system has shown unprecedented performance in terms of control accuracy and sensing noise. The BPC system has achieved a control accuracy of ～10~(-8) rad for the tilt and ～10~(-7) m for the shift and a sensing noise of less than 1 n rad/(Hz)~(1/2), which is compliant with the Advanced Virgo GW ITF requirements.
机译：在本文中，将描述一种简单有效的控制系统，该系统用于监视和抑制光学系统输入处的光束抖动噪声，称为光束指向控制（BPC）系统，展示了该系统的理论原理和实验演示。大型重力波（GW）干涉仪（ITF）的应用，尤其是高级处女座探测器的应用。为此，将通过考虑高级处女座光学配置来计算对控制精度和感测噪声的要求，并将结果与​​实验室获得的实验测量结果进行比较。该系统在控制精度和感测噪声方面显示出前所未有的性能。 BPC系统的倾斜度控制精度为〜10〜（-8）rad，位移的控制精度为〜10〜（-7）m，感测噪声小于1 n rad /（Hz）〜（1 / 2），符合Advanced Virgo GW ITF要求。

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