论文标题
研究Kagra重力波检测器振动隔离系统中裂纹噪声的研究
Investigation of crackling noise in the vibration isolation systems of the KAGRA gravitational wave detector
论文作者
论文摘要
引力波检测器（例如Kagra）需要复杂的镜面悬架系统才能达到高灵敏度。在这些悬浮液中，一个特别关注的问题是存在crack噪声，其中钢晶体结构的运动干扰了物质缺陷，从而导致冲动力释放和令人兴奋的镜面运动。 Kagra悬架系统中的几何反弹簧过滤器（气）中的裂纹可能在重力波检测带中引入噪声。我们研究具有低频周期性应力的微型气体中的裂纹噪声。我们在微型和Kagra气体之间制定了扩展定律。将实验结果应用于缩放定律使我们能够估计卡格拉裂纹噪声的上限。发现裂纹噪声应低于60 Hz以上的重力波的目标灵敏度。
Gravitational wave detectors, such as KAGRA, require complex mirror suspension systems to reach high sensitivity. One particular concern in these suspensions is the presence of crackling noise, where motion of the steel crystal structure disturbs material defects, causing impulse force release and exciting mirror motion. Crackling in the Geometric Anti Spring filters (GAS) in KAGRA's suspension system could introduce noise in the gravitational wave detection band. We investigate crackling noise in a miniature GAS with a low-frequency cyclical stress. We developed a scaling law between miniature and KAGRA GAS. Applying experimental results to the scaling law allows us to estimate the upper limit of crackling noise in KAGRA. It is found that crackling noise should be below the target sensitivity for gravitational waves above 60 Hz.
