Vibration isolation systems for the beam splitter and signal recycling mirrors of the KAGRA gravitational wave detector
Vibration isolation systems for the beam splitter and signal recycling mirrors of the KAGRA gravitational wave detector
复制标题
KAGRA 引力波探测器的分束器和信号回收镜的振动隔离系统
DOI：
10.1088/1361-6382/abd922
复制
发表时间：
2021
影响因子：
3.5
通讯作者：
KAGRA Collaboration
中科院分区：
文献类型：
--
作者：
Ushiba Takafumi;Shinji Miyoki;et al;桜井 芳生 西谷 篤 赤川 学 尾上 正人 安宅 弘司;西谷篤・桜井芳生;KAGRA Collaboration
KAGRA是一种地下干涉引力波探测器，目前正在投入使用。该探测器依靠高性能的隔振系统来悬浮其关键光学元件。这些悬架有四种不同的配置，其中b型悬架用于分束器和信号回收镜。b型悬架包括有效载荷、三个用于垂直隔离的几何反弹簧过滤器和一个用于水平隔离的倒立摆。有效载荷包括光学、牵线木偶和它们的后坐力质量，其中包含用于阻尼悬架本身振荡谐振模式的局部位移传感器和线圈磁铁致动器。分束器版本有一个修改的下部分，以容纳更宽的光学元件。有效载荷还配备一个光学杠杆，用于监视和控制地面悬挂光学元件的位置。所有四个悬架现在都安装在真空室中。我们描述了机械、电气和控制设计，并将测量性能与要求进行了比较。
KAGRA is an underground interferometric gravitational wave detector which is currently being commissioned. This detector relies on high-performance vibration-isolation systems to suspend its key optical components. These suspensions come in four different configurations, of which the type-B is used for the beam splitter and signal recycling mirrors. The type-B suspension comprises the payload, three geometric anti-spring filters for vertical isolation and one inverted pendulum for horizontal isolation. The payload comprises the optic, its marionette and their recoil masses, which hold local displacement sensors and coil magnet actuators used for damping the resonant modes of oscillation of the suspension itself. The beam splitter version has a modified lower section to accommodate a wider optical component. The payload is also equipped with an optical lever, used to monitor and control the position of the suspended optics from the ground. All four suspensions have now been installed in vacuum chambers. We describe the mechanical, electrical and control design, and the measured performance compared to requirements.