Low Frequency Isolation Systems for Gravitational Wave Interferometers

用于引力波干涉仪的低频隔离系统

• 批准号: 9208524
• 负责人: James Faller
• 金额: $ 62万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-07-15 至 1995-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9208524&HistoricalAwards=false
• 关键词: Low; Frequency; Isolation; Systems; Gravitational

Laser interferometer gravitational wave detectors have their end mirrors mounted on pendulums to isolate them from disturbances. Research will be carried out on methods for very strongly isolating the support points for the pendulums from ground motions at frequencies of 1 to 10 Hz. A preliminary isolation stage is now being constructed, and two additional stages with much lower noise will be designed, built and tested. With all three stages operating together, the final isolated platform will have lower displacement and tilt noise than ever has been achieved before. Then, the final platform will be used to suspend two pendulums so that the effects of thermally generated noise in the pendulum support wires can be measured directly. The goal of this research is to find practical ways of supporting the mirrors in gravitational wave detectors so that the noise in the mirror separation at frequencies of 1 to 10 Hz can be reduced to the unavoidable effects of locally generated gravitational fields from density fluctuations in the ground and the air. This will aid in detecting gravitational wave signals from astronomical sources which do not radiate strongly at higher frequencies. The low frequency isolation methods developed are likely to be useful in industry and in other scientific measurements.

激光干涉引力波探测器 他们的末端镜子安装在镜子上， 干扰. 将研究采取何种方法， 非常牢固地隔离了支撑点， 频率为1到10赫兹的地面运动。 一 初步隔离阶段正在建设中， 将设计具有低得多的噪声的附加级， 建造和测试。 三个阶段一起工作， 最终的隔离平台将具有较低的位移， 倾斜噪声比以往任何时候都要高。 然后 最后一个平台将用于悬挂两个平台， 钟摆中热产生的噪声的影响 可以直接测量支撑线。 这项研究的目的是找到实用的方法， 支撑引力波探测器中的镜子， 在1到10的频率处的镜分离中的噪声 Hz可以减少到不可避免的影响， 密度波动产生的引力场 地面和空中。 这将有助于检测 来自天文源的引力波信号， 在较高的频率下不会强烈辐射。 低频 开发的分离方法可能有助于 工业和其他科学测量。