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arXiv 1409.3284gr-qcastro-ph.IMphysics.ins-detphysics.optics
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大尺度引力波干涉仪参量不稳定性的时间演化

Time evolution of parametric instability in large-scale gravitational-wave interferometers

Stefan L. Danilishin, Sergey P. Vyatchanin, David G. Blair, Ju Li, Chunnong Zhao

摘要:

本文研究了大尺度引力波探测器中的三模参量不稳定性。以前的工作使用线性化模型来研究不稳定的发生。本文对这种现象进行了非线性研究,结果表明,在反射镜的高阶光学模和机械内模的振幅指数上升的初始阶段之后是一个饱和阶段,在此阶段中,所有三个参与模式都达到一个新的平衡态,其振荡振幅保持不变。结果表明,在存在这种不稳定性的情况下,干涉仪的稳定操作是可能的,从而简化了抑制的任务。

英文摘要:

We present a study of three-mode parametric instability in large-scale gravitational-wave detectors. Previous work used a linearised model to study the onset of instability. This paper presents a non-linear study of this phenomenon, which shows that the initial stage of exponential rise of the amplitudes of a higher order optical mode and the mechanical internal mode of the mirror is followed by a saturation phase, in which all three participating modes reach a new equilibrium state with constant oscillation amplitudes. Results suggest that stable operation of interferometers may be possible in the presence of such instabilities, thereby simplifying the task of suppression.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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