Research on Suspensions for Gravitational Wave Detectors

* 9870032Gonzalez将设计一种改进的双摆悬挂系统，用于测试引力波探测器中的质量，并将建造一个原型。 这为在LIGO探测器环境中悬挂和控制测试质量提供了一种可行的方法。 将设计不同的摆振模态传感器和摆质量上的致动器，并在样机上进行测试。 目前世界各地正在建造几个干涉引力波探测器。 他们使用各种不同的悬挂测试质量的方法，使它们可以与地震噪声隔离，并在尽可能宽的频率范围内作为重力场的自由质量处理。 悬挂设计的选择代表了地震隔离、热噪声、可靠性和控制设计之间的微妙平衡。 LIGO探测器的最初设计是最简单的钟摆设计。 宾夕法尼亚州立大学的努力与LIGO科学合作组织的其他小组的工作相结合，将提供一个更好的悬挂系统的设计和原型，该系统将通过减少地震和热噪声贡献来提高LIGO探测器在低频的灵敏度。

***9870032GonzalezAn improved, double-pendulum suspension system for the test of masses in gravitational wave detectors will be designed and a prototype will be built. It will provide a feasible way of suspending and controlling the test masses in the LIGO detector environment. Different sensors of the pendulum modes and actuators on the pendulum masses will be designed and tested on the prototype. Several interferometric gravitational wave detectors are now in construction around the world. They use various different ways of suspending the test masses so that they can be isolated from seismic noise and treated as free masses for the gravitational field in the widest possible frequency range. A choice of a suspension design represents a delicate balance between seismic isolation, thermal noise, reliability and control design. The initial design for the LIGO detectors is the simplest pendulum design. The effort at Penn State, integrated with the work of other groups in the LIGO Science Collaboration, will provide a design and a prototype of a better suspension system that will increase the sensitivity of the LIGO detectors at low frequencies by reducing the seismic and thermal noise contributions.***