Einstein Telescope R&D

ET-R&D项目旨在为第三代地下引力波探测器爱因斯坦望远镜的技术设计做准备。虽然基本设计主要依赖于为先进探测器开发和测试的技术，但仍有几个方面需要长时间的研发。我们建议通过5个工作组（WG）来瞄准ET-R&D项目中最重要的主题。WG 1将探索如何使用ET测试天体物理源模型和GR本身，以及可以从数据中提取多少关于宇宙动力学的信息。第二工作组将收集各种候选场地的长期地震数据，并开发直接与试验块体运动耦合的地震运动测量方法，目的是开发减法技术。第三工作组将研究低温光学的特性，这些特性对于降低探测器热噪声和提供良好的低频性能至关重要。第四工作组将研究三种不同ET探测器数据中各种干涉仪自由度和噪声相关性的控制。第五工作组将侧重于总体项目管理。

The ET-R&D project is aimed at essential R&D tasks in preparation for a technical design of the Einstein Telescope, a 3rd generation, underground gravitational wave detector. While the basic design mostly relies on techniques well developed and tested for the advanced detectors, several aspects still require R&D with long lead times. We propose to target the most important of these topics in this ET-R&D project via 5 working groups (WGs).WG1 will explore how well astrophysical source models and GR itself can be tested with ET, and how much information on the dynamics of the universe can be extracted from the data. WG2 will collect long term seismic data for various candidate sites and develop methods for measuring the seismic motion which directly couples to the test mass motion, with the goal of developing subtraction techniques. WG3 will investigate properties of cryogenic optics essential for lowering detector thermal noise and providing good low frequency performance. The control of various interferometer degrees of freedom and noise correlations in the data of the three different ET detectors will be studied in WG4. WG5 will focus on overall project management.