AI 中文总结
针对LIGO干涉仪锁获取耗时且成功率低的问题，加州理工学院团队在40米原型干涉仪上实现了高带宽控制臂腔长度的快速锁获取方案，该框架可应用于LIGO。
AI 中文摘要
引力波天文台是大型激光干涉仪，需维持在共振状态以探测引力波。实现该共振状态是耗时过程，在LIGO引力波天文台中，此过程成功率相对较低，导致观测时间损失，减少可观测天体物理事件数量。该问题的主要原因是干涉仪纵向自由度间的耦合，尤其是臂腔长度到中央自由度（如回收腔和迈克尔逊干涉仪）的耦合。我们在加州理工学院的40米原型干涉仪上展示了一种更简单、更快的锁获取方案，该方案通过在锁获取过程中以高带宽控制臂腔长度实现。本文描述了这种快速锁获取的实现方式，将其与当前LIGO的锁获取方法进行比较，并讨论如何将我们的框架应用于LIGO。
英文摘要
Gravitational wave observatories are large scale laser interferometers which are held on resonance to facilitate the detection of gravitational waves. Achieving this resonant condition is a time consuming process, and in the LIGO gravitational-wave observatories this procedure has a relatively low success rate. This limitation leads to a loss of observation time thereby reducing the number of observable astrophysical events. The primary cause of this problem is the coupling among the longitudinal degrees of freedom of the interferometer, particularly the coupling from the arm cavity lengths to the central degrees of freedom, such as the recycling cavities and the Michelson interferometer. We demonstrate a simpler and faster lock acquisition scheme at the 40-meter prototype interferometer, located at the California Institute of Technology. This scheme is achieved by controlling the arm cavity lengths with high bandwidth during the lock acquisition process. In this paper, we describe how this fast lock acquisition is realized, compare it with the current LIGO lock acquisition method, and discuss how our framework can be implemented in LIGO.
Comments24 pages, 12 figures, 7 tables
