Stanford Program in Support of LIGO - Seismic Isolation and Controls

斯坦福大学支持 LIGO 的项目 - 地震隔离和控制

• 批准号: 2309161
• 负责人: Robert Byer
• 金额: $ 180万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-11-15 至 2026-10-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2309161&HistoricalAwards=false
• 关键词: Stanford; Program; Support; LIGO; Seismic

The team at Stanford works to improve the performance and reliability of NSF's Laser Interferometer Gravitational-wave Observatories (LIGO) by developing technology and techniques to improve the isolation of the optics and reduce the impact of ground motion on the detectors. This award will help LIGO implement a new auxiliary laser sensing technology to improve the control and lower the noise of the ground motion isolation systems. It also supports research to reduce the noise of the suspended optics by developing advanced control techniques to better integrate the isolation and suspension subsystems. The improved technology and control schemes funded by this grant will help maximize the scientific output of these premier facilities. This award also supports the design of new suspensions which will provide a significant upgrade to the astrophysical reach of the existing detectors.This grant supports development of several complementary approaches to improving LIGO. It supports the construction and testing of a Seismic Platform Interferometer (SPI) in the test facility at Stanford. This SPI is designed to interferometrically connect the various isolation systems at the Observatories to dramatically reduce the inertial and the relative motion at frequencies below 1 Hz. These sensors are now running at the lab scale and this award provides the support to move these into a first implementation at a LIGO observatory. This integration should reduce the control noise and improve robustness of the LIGO detectors. In the long term, this grant supports the design effort for the new “Heavy Suspension” for an upgrade for LIGO known as A# (to follow A+ which and now being developed by the LIGO Scientific Collaboration). By increasing the mass of the main mirrors from 40 kg to 100 kg and improving the controllability of the suspension system, this upgrade should allow the detectors to reach fundamental noise sources all the way down to 10 Hz. This low frequency performance improvement will significantly improve the ability of the LIGO detectors to see the inspiral phase of binary neutron stars and measure the merger of black holes which are more than 100 times the mass of our sun.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

斯坦福大学的团队致力于提高NSF激光干涉仪重力波动器（LIGO）的性能和可靠性，通过开发技术和技术来改善光学的隔离并减少地面运动对检测器的影响。该奖项将有助于Ligo实施一种新的辅助激光传感技术，以改善控制并降低地面运动隔离系统的噪声。它还通过开发高级控制技术来更好地整合隔离和悬架子系统，从而减少悬浮光学噪声的研究。这笔赠款资助的改进的技术和控制方案将有助于最大化这些主要设施的科学产出。该奖项还支持设计新悬架的设计，这将为现有探测器的天体物理覆盖率提供大量升级。这项赠款支持开发几种改善Ligo的完整方法。它支持斯坦福大学测试设施中的地震平台干涉仪（SPI）的构建和测试。该SPI旨在干预观测值的各种隔离系统，以大大减少惯性和相对运动以下的频率低于1 Hz。这些传感器现在正在实验室规模上运行，该奖项提供了将这些传感器转移到Ligo观察中的首次实现的支持。这种整合应减少控制噪声并改善Ligo探测器的鲁棒性。从长远来看，该赠款支持新的“重型悬架”的设计工作，以升级Ligo被称为＃的升级（遵循A+，现在由Ligo Scientific Collaboration开发）。通过将主反射镜的质量从40千克增加到100千克并提高悬架系统的可控性，该升级应允许检测器到达基本噪声源，一直降低至10 Hz。这种低频率性能的改善将显着提高LIGO探测器看到二进制中子星的灵感阶段的能力，并测量黑洞的合并，这是我们太阳质量的100倍以上。该奖项反映了NSF的法定任务，并通过使用基金会的知识分子和宽广的影响来评估NSF的法定任务，并被视为珍贵的支持。