Institute for Gravitational Wave Astronomy and School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, United Kingdom.
Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Campus, Didcot OX11 0QX, United Kingdom.
Rev Sci Instrum. 2023 Jan 1;94(1):014502. doi: 10.1063/5.0117605.
Advanced Laser Interferometer Gravitational-wave Observatory (LIGO A+) is a major upgrade to LIGO-the Laser Interferometer Gravitational-wave Observatory. For the A+ project, we have developed, produced, and characterized sensors and electronics to interrogate new optical suspensions designed to isolate optics from vibrations. The central element is a displacement sensor with an integrated electromagnetic actuator known as a BOSEM (Birmingham Optical Sensor and ElectroMagnetic actuator) and its readout and drive electronics required to integrate them into LIGO's control and data system. In this paper, we report on the improvements to the sensors and the testing procedures undertaken to meet the enhanced performance requirements set out by the A+ upgrade to the detectors. The best devices reach a noise level of 4.5 ×10m/Hz at a measurement frequency of 1 Hz, an improvement of 6.7 times over standard devices.
先进激光干涉引力波天文台（LIGO A+）是 LIGO——激光干涉引力波天文台的重大升级。对于 A+ 项目，我们已经开发、生产和表征了传感器和电子设备，以探测新的光学悬浮系统，旨在将光学元件与振动隔离开来。核心元件是一种带有集成电磁执行器的位移传感器，称为 BOSEM（伯明翰光学传感器和电磁执行器），以及将其集成到 LIGO 的控制和数据系统所需的读出和驱动电子设备。在本文中，我们报告了传感器的改进和为满足探测器 A+升级提出的更高性能要求而进行的测试程序。最好的器件在测量频率为 1 Hz 时达到了 4.5×10m/Hz 的噪声水平，比标准器件提高了 6.7 倍。
