Inertial Sensors for Ground Based Gravitational Wave Detectors

用于地面引力波探测器的惯性传感器

• 批准号: 2117289
• 金额: --
• 依托单位: University of Birmingham
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2117289
• 关键词: Inertial; Sensors; Ground; Based; Gravitational

The research for seismic isolation aims to continue on the work from Dr Conor Mow-Lowry and Dr Denis Martynov of the University of Birmingham. They have proposed a 6D inertial isolator which is a device that consists of a proof mass that is softly suspended from a platform (linked to the ground) which remains inertial above its resonant frequencies. 6D is sensitive to ground motion in 6 degrees of freedom (3 translational and 3 rotational) which are detected via interferometric readout. Current isolation systems and seismometers have an inherent issue with tilt-to-horizontal coupling, effecting the output signal. The goal is to measure the platform motion in all degrees of freedom, therefore removing the tilt from the translational motion. This work will be beneficial in improving the seismic isolation at the detector sites of aLIGO and future upgrades to detect gravitational waves down to 5Hz (LIGO-LF). My research will involve modelling the dynamics of this system and working on control mechanisms to stabilise the suspended mass. Another aspect of the research will be designing and constructing a 6-axis stage platform. This will be similar to the Inertial Seismic Isolation (ISI) platforms used in Advanced LIGO (aLIGO). The final goal would be to create a prototype of the system.The rotational sensor will potentially be a whispering gallery mode optical gyroscope based on stimulated Brillouin Scattering and dispersion using the Sagnac effect. An optical gyroscope has the benefit of no losses due to friction, thereby increasing their reliability compared to their mechanical counterparts. The project will involve construction of the device and experimentally testing its sensitivity. Detection of ground rotation or rotational drift of suspended masses will likely be the application of this device. Other applications will be position sensing on space instruments. However, the gyroscope may also have commercial uses (such as navigation) as it will be a small (currently unspecified) size which can potentially be deployed on many systems as an aftermarket attachment.

隔震研究旨在继续伯明翰大学的Conor Mow-Lowry博士和Denis Martynov博士的工作。他们提出了一种6D惯性隔离器，该隔离器是一种由从平台（连接到地面）软悬挂的检测质量组成的设备，该平台在其谐振频率以上保持惯性。6D对通过干涉仪读出检测的6个自由度（3个平移和3个旋转）的地面运动敏感。当前的隔离系统和地震仪具有倾斜到水平耦合的固有问题，从而影响输出信号。目标是在所有自由度上测量平台运动，从而从平移运动中去除倾斜。这项工作将有利于改善aLIGO探测器位置的地震隔离，并在未来升级到探测5 Hz以下的引力波（LIGO-LF）。我的研究将涉及模拟这个系统的动力学和控制机制，以稳定悬浮质量的工作。本研究的另一个方向是设计和建造一个六轴平台。这将类似于高级LIGO（aLIGO）中使用的惯性地震隔离（ISI）平台。最终的目标是建立一个系统的原型。旋转传感器将可能是一个回音壁模式的光学陀螺仪的基础上受激布里渊散射和色散使用Sagnac效应。光学陀螺仪的优点是没有摩擦损失，因此与机械陀螺仪相比，提高了其可靠性。该项目将涉及该装置的建造和实验测试其灵敏度。地面旋转或悬挂质量的旋转漂移的检测将可能是该装置的应用。其他应用将是空间仪器上的位置传感。然而，陀螺仪也可能具有商业用途（例如导航），因为它将是小的（目前未指定）尺寸，可以作为售后附件部署在许多系统上。