ET R&D

ETR

• 批准号: ST/L000806/1
• 负责人: Iain Martin
• 金额: $ 4.85万
• 依托单位: University of Glasgow
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2013
• 资助国家: 英国
• 起止时间: 2013 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FL000806%2F1
• 关键词: ET; R&D

Gravitational waves are the last prediction of general relativity still awaiting direct experimental detection. The efforts in constructing and optimising large interferometers in different locations all over the world in the last two decades have resulted in instruments of extraordinary sensitivity. While the British/German gravitational wave detector GEO 600 is currently taking data, the American LIGO detectors and the Franco/Italian Virgo detector are being upgraded to further increase their sensitivity. Once these upgrades have reached their design sensitivity the theoretical estimates predict the detection of gravitational waves within a few months to a year. Although frequent detections will be possible, the detection of high signal to-noise ratio events, allowing precision gravitational wave astronomy, will be very rare.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. It is widely expected that this detector will allow routine gravitational wave astronomy to take place. 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. Glasgow University will play a key role in three of the working groups. In WG1, we will develop methods of parameter estimation for transient signals detected by ET, through application of our existing expertise in gravitational wave data analysis. In WG3 we will develop apparatus for measuring the birefringence of coated silicon samples and apply our expertise in finite element modelling to assist in the interpretation of cryogenic birefringence measurements carried out in collaboration with Hannover and Jena. In WG4 we will carry out studies and simulations of sensing and control issues for ET and carry out detailed modelling of the quantum noise and optical configuration. Collaboration with our UK and European partners and combination of the facilities and expertise available will be essential for the success of this proposal.

重力波是仍在等待直接实验检测的一般相对论的最后一个预测。在过去的二十年中，在世界各地的不同地点建造和优化大型干涉仪的努力导致了极其敏感的工具。尽管英国/德国引力探测器GEO 600目前正在获取数据，但美国LIGO探测器和Franco/Italian处女座检测器正在升级以进一步提高其敏感性。一旦这些升级达到其设计敏感性，理论估计值就预测了几个月至一年内引力波的检测。尽管将可能进行频繁的检测，但是允许精确引力波天文学的高信号待机比事件的检测将非常罕见。ET-R＆D项目旨在为EINSTEIN望远镜的技术设计做准备，该项目为Einstein Telescope做准备，这是第三代，地下雷神波探测器。人们普遍期望该检测器将允许进行常规的重力波天文学。尽管基本设计主要依赖于对高级探测器进行了良好开发和测试的技术，但一些方面仍然需要长时间的研发时间。我们建议通过5个工作组（WGS）在此ET-R＆D项目中针对这些主题中最重要的主题。WG1将探讨如何通过ET测试天体物理源模型和GR本身，以及从数据中提取有关宇宙动力学的多少信息。 WG2将收集各种候选地点的长期地震数据，并开发用于测量地震运动的方法，该方法直接将其与测试质量运动耦合在一起，目的是开发减法技术。 WG3将调查对于降低检测器热噪声并提供良好低频性能至关重要的低温光学元件的性能。将在WG4中研究对三个不同ET检测器数据中各种干涉仪自由度和噪声相关性的控制。 WG5将专注于整体项目管理。格拉斯哥大学将在三个工作组中发挥关键作用。在WG1中，我们将通过在引力波数据分析中应用现有的专业知识来开发ET检测到的瞬态信号的参数估计方法。在WG3中，我们将开发用于测量涂层硅样品双折射的设备，并将我们的专业知识应用于有限元建模中，以帮助解释与汉诺威和Jena合作进行的低温双向双向测量。在WG4中，我们将对ET的感应和控制问题进行研究和模拟，并对量子噪声和光学配置进行详细的建模。与我们的英国和欧洲合作伙伴的合作以及可用的设施和专业知识的组合对于该提案的成功至关重要。

项目成果

Amorphous Silicon with Extremely Low Absorption: Beating Thermal Noise in Gravitational Astronomy.

吸收率极低的非晶硅：克服引力天文学中的热噪声。

• DOI: 10.1103/physrevlett.121.191101
• 发表时间: 2018
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: Birney R

Low temperature mechanical dissipation of an ion-beam sputtered silica film

• DOI: 10.1088/0264-9381/31/3/035019
• 发表时间: 2014-02
• 期刊: Classical and Quantum Gravity
• 影响因子: 3.5
• 作者: I. Martin;R. Nawrodt;K. Craig;C. Schwarz;R. Bassiri;G. Harry;J. Hough;S. Penn;S. Reid;R. Robie;S. Rowan

Mapping the optical absorption of a substrate-transferred crystalline AlGaAs coating at 1.5 µ m

绘制 1.5 µm 基底转移结晶 AlGaAs 涂层的光吸收图

• DOI: 10.1088/0264-9381/32/10/105008
• 发表时间: 2015
• 期刊: Classical and Quantum Gravity
• 影响因子: 3.5
• 作者: Steinlechner J

Anomalous optical surface absorption in nominally pure silicon samples at 1550 nm

标称纯硅样品在 1550 nm 处的反常光学表面吸收

• DOI: 10.1088/1361-6382/aa8aac
• 发表时间: 2017
• 期刊: Classical and Quantum Gravity
• 影响因子: 3.5
• 作者: Bell A