引力波探测中的被动隔振系统

THE PASSIVE VIBRATION ISOLATION SYSTEMS AGAINST SEISMIC NOISE IN GRAVITATIONAL WAVE DETECTION

介绍了引力波探测实验中的被动隔振系统的基本原理和研究现状,讨论其性能及特点.低频被动隔振系统,如七级气体弹簧隔振系统,多级隔振堆,四级悬臂弹簧隔振系统以及三级弯曲弹簧隔振系统在10Hz以上,都具有好的隔振性能;倒摆、折叠摆、 X摆和锥摆等超低频水平隔振系统实现了几十秒的共振周期;建立在对称扭杆弹簧系统基础上,构思新颖的被动垂直隔振系统克服了传统被动垂直隔振系统无法解决的困难,实现了超低频被动垂直隔振.

The passive vibration isolation systems against seismic noise for gravitational wave detectors are reviewed in this paper, including the principle of the isolators and the recent progresses in the field as well as the performances and characteristics of the isolators. Some low frequency passive isolators, such as the seven-stage gas spring super- attenuator, the isolation stacks, the four-stage cantilever spring vibration isolator and the three- stage curved cantilever spring isolator, are shown to have a good isolation performance in the range above 10 Hz. Several ultra-low frequency horizontal vibration isolators, including the inverted pendulum system, the folded pendulum, the .X-pendulum, the conical pendulum, may have a resonant period of tens of seconds. The innovative prototype of the long period vertical vibration isolators based on torsion spring, which eliminates the difficulty in a traditional mass-spring vertical vibration isolator, provides an ultra-low frequency vertical vibration isolation.