High Precision Mechanical Tiltmeter for Advanced LIGO

适用于先进 LIGO 的高精度机械倾斜仪

• 批准号: 1306613
• 负责人: Jens Gundlach
• 金额: $ 30万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1306613&HistoricalAwards=false
• 关键词: Precision; Mechanical; Tiltmeter; Advanced; LIGO

Unprecedented levels of seismic isolation are required to achieve the sensitivity necessary to observe gravitational waves in Advanced LIGO. This award supports the development of instruments and techniques to ammeliorate the effect of seismic vibrations on the overall detector performance. The active seismic isolation stages in Advanced LIGO employ seismometers located on the ground and on the isolated platform to measure and subtract ground motion. However, horizontal seismometers cannot distinguish between ground tilt and horizontal acceleration. Tilt-horizontal coupling complicates the feedback and is a significant noise source for seismic isolation in Advanced LIGO. This award supports the development of a high precision inertial sensor to measure horizontal tilt independently from horizontal acceleration. Removing tilt and tilt noise from the horizontal seismometer channels will improve Advanced LIGO seismic isolation.The tiltmeters we are developing are unique and not commercially available. These instruments may have applications in other fields of science such as in geophysics, well beyond gravitational wave research. This award not only supports the development of a device for Advanced LIGO but it also serves to maintain and strengthen synergistic activities of our table-top gravity group with the gravitational wave detection community. The technical developments and experiments are carried out by a university-based research group, which has a strong tradition of educating undergraduate students, graduate students and postdocs in building precision mechanical instruments. With the expertise gained through projects, such as developing a one-of-a-kind tiltmeter, our students fill positions in academia as well as highly skilled positions in industry. Our group is strongly committed to outreach on all levels.

需要进行前所未有的地震隔离水平，以实现观察晚期Ligo重力波所需的灵敏度。该奖项支持仪器和技术的开发，以增强地震振动对整体检测器性能的影响。高级LIGO中的主动地震隔离阶段采用位于地面和隔离平台上的地震仪来测量和减去地面运动。但是，水平地震米无法区分地面倾斜和水平加速度。倾斜 - 旋转的耦合使反馈复杂化，并且是晚期Ligo中地震隔离的重要噪声源。该奖项支持高精度惯性传感器的开发，以独立于水平加速度测量水平倾斜。从水平地震计通道中删除倾斜和倾斜噪声将改善晚期的Ligo地震隔离。我们正在开发的倾斜度是独一无二的，并且无法商业上可用。这些工具可能在其他科学领域（例如地球物理学）中有应用，远远超出了重力波研究。该奖项不仅支持为高级Ligo设备的开发，而且还可以通过重力波检测界维持和加强我们台式重力组的协同活动。技术发展和实验是由大学的研究小组进行的，该小组具有牢固的传统，该小组在构建精确的机械仪器方面对本科生，研究生和博士学位进行了教育。随着通过项目获得的专业知识，例如开发一种独一无二的倾斜表，我们的学生填补了学术界的职位以及行业中高技能的职位。我们的小组强烈致力于在各个层面上进行宣传。