Robertson N A, Fritschel P, Shapiro B, Torrie C I, Evans M
LIGO, California Institute of Technology, Pasadena, California 91125, USA.
LIGO, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Rev Sci Instrum. 2017 Mar;88(3):035117. doi: 10.1063/1.4978796.
We discuss the requirements, design, and performance of a tuned mass damper which we have developed to damp the highest frequency pendulum modes of the quadruple suspensions which support the test masses in the two advanced detectors of the Laser Interferometric Gravitational-Wave Observatory. The design has to meet the requirements on mass, size, and level of damping to avoid unduly compromising the suspension thermal noise performance and to allow retrofitting of the dampers to the suspensions with minimal changes to the existing suspensions. We have produced a design satisfying our requirements which can reduce the quality factor of these modes from ∼500 000 to less than 10 000, reducing the time taken for the modes to damp down from several hours to a few minutes or less.
我们讨论了一种调谐质量阻尼器的要求、设计和性能。我们开发这种阻尼器是为了抑制四极悬挂系统的最高频率摆式模式，该悬挂系统支撑着激光干涉引力波天文台两个先进探测器中的测试质量块。该设计必须满足质量、尺寸和阻尼水平方面的要求，以避免过度损害悬挂系统的热噪声性能，并允许在对现有悬挂系统进行最小改动的情况下将阻尼器改装到悬挂系统上。我们已经设计出了一种满足要求的产品，它可以将这些模式的品质因数从约500000降低到10000以下，将这些模式衰减所需的时间从几个小时减少到几分钟或更短。
