Angular instability due to radiation pressure in the LIGO gravitational-wave detector.
Angular instability due to radiation pressure in the LIGO gravitational-wave detector.
复制标题
LIGO 引力波探测器中的辐射压力导致角不稳定性。
作者：
E. Hirose;K. Kawabe;D. Sigg;R. Adhikari;P. Saulson
我们在 LIGO 汉福德天文台观察了辐射压力对激光干涉引力波天文台 (LIGO) 干涉仪核心光学器件的角度传感和控制系统的影响。这是在完整的引力波干涉仪中首次测量这种效应。两种角度模式中只有一种能够通过反馈控制生存，因为当控制增益足够大时，另一种模式会被抑制。我们开发了一个数学模型来理解系统的物理原理。该模型与我们观察到的动态非常匹配。
We observed the effect of radiation pressure on the angular sensing and control system of the Laser Interferometer Gravitational-Wave Observatory (LIGO) interferometer's core optics at LIGO Hanford Observatory. This is the first measurement of this effect in a complete gravitational-wave interferometer. Only one of the two angular modes survives with feedback control, because the other mode is suppressed when the control gain is sufficiently large. We developed a mathematical model to understand the physics of the system. This model matches well with the dynamics that we observe.