论文标题
量子噪声目标对爱因斯坦望远镜基础设施设计的含义
Implications of the Quantum Noise Target for the Einstein Telescope Infrastructure Design
论文作者
论文摘要
爱因斯坦望远镜（ET）等复杂仪器的设计基于源自科学探索的精心案例的目标灵敏度。同时，它结合了许多权衡决策，以通过平衡各个子系统的性能与安装和操作成本来最大化科学价值。在本文中，我们讨论了长信号回收腔（SRC）对量子噪声性能的影响。我们显示了由于长期SRC对ET高频干涉仪的敏感性的降低，提供了可能的补偿方案的详细信息，并提出了SRC长度的降低。我们还回想起滤波器长度和光学损失之间权衡的细节，并显示了ET低频干涉仪的严格要求。最后，我们为使用耦合腔的ET低频干涉仪提供了一种替代滤波器设计，并在这种情况下讨论了设计的优势。
The design of a complex instrument such as Einstein Telescope (ET) is based on a target sensitivity derived from an elaborate case for scientific exploration. At the same time it incorporates many trade-off decisions to maximise the scientific value by balancing the performance of the various subsystems against the cost of the installation and operation. In this paper we discuss the impact of a long signal recycling cavity (SRC) on the quantum noise performance. We show the reduction in sensitivity due to a long SRC for an ET high-frequency interferometer, provide details on possible compensations schemes and suggest a reduction of the SRC length. We also recall details of the trade-off between the length and optical losses for filter cavities, and show the strict requirements for an ET low-frequency interferometer. Finally, we present an alternative filter cavity design for an ET low-frequency interferometer making use of a coupled cavity, and discuss the advantages of the design in this context.
