A Search for Gravitational Radiation at LIGO

在 LIGO 寻找引力辐射

• 批准号: 9800961
• 负责人: James Brau
• 金额: $ 23.5万
• 依托单位: University of Oregon Eugene
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-01 至 2000-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9800961&HistoricalAwards=false
• 关键词: Search; Gravitational; Radiation; LIGO

***9800961BrauThe Oregon Experimental Relativity Group will collaborate with the LIGO Scientific Collaboration on preparations to search for gravitational radiation. With the construction of LIGO, a new era of sensitivity to gravitational radiation will begin. After LIGO commissioning, the first detection of the effects of gravity waves on the strain measurements in the LIGO interferometers will come from careful analysis of noise-dominated data streams. This will require a careful characterization of the noise, including the many sources of environmental noise, and the correlation of these noise sources among interferometers. Environmental noise includes subtle effects such as stray magnetic field and cosmic ray interactions with detector elements that may limit LIGO's sensitivity after the initial phase of operation. Prior to LIGO commissioning, during the next two years, the Oregon group will develop analysis techniques, analyze simulated interferometer data sets, and investigate the influence of environmental factors on this simulated data and the anticipated real data.Following the discovery and the initial tests of General Relativity, one can expect a new astronomy of detection of emitters of gravitational radiation to greatly expand our understanding of the universe. By concentrating on data analysis and investigation of environmental influences on the interferometer data, the Oregon group will make an important contribution to the creation and exploration of this new frontier. Successful observation of gravity waves will rely on detailed data analysis of an evolving nature. Initially there is the identification of spurious noise and faulty performance of the instrument. Success will depend on analysis tools that are able to isolate quickly sources for correction. This also requires a good characterization of the surrounding environmental noise sources. As the performance improves, the irreducible limits of performance will be explored. Only with an advanced understanding of the character of the LIGO data will it be possible to develop new techniques to search for increasingly subtle sources of gravitational radiation, and to adapt these techniques to test new effects and ideas. By developing tools to understand this data, the Oregon group will be in a position to exploit fully the science of LIGO after LIGO is commissioned by the LIGO Laboratory.***

* 9800961 Brau俄勒冈州实验相对论小组将与LIGO科学合作组织合作，为寻找引力辐射做准备。 随着LIGO的建成，一个对引力辐射敏感的新时代将开始。 在LIGO调试之后，第一次检测重力波对LIGO干涉仪应变测量的影响将来自对噪声主导的数据流的仔细分析。 这将需要仔细描述噪声的特性，包括许多环境噪声源，以及干涉仪之间这些噪声源的相关性。 环境噪声包括杂散磁场和宇宙射线与探测器元件的相互作用等微妙的影响，这些影响可能会限制LIGO在运行初始阶段后的灵敏度。 俄勒冈州团队在LIGO启动前的两年里，将开发分析技术，分析模拟干涉仪数据集，研究环境因素对模拟数据和预期的真实的数据的影响。随着广义相对论的发现和初步检验，可以期待一种新的天文学，即探测引力辐射发射器，大大扩展我们对宇宙的理解。 俄勒冈州小组将集中精力进行数据分析和调查环境对干涉仪数据的影响，从而为这一新领域的创建和探索作出重要贡献。 重力波的成功观测将依赖于不断变化的详细数据分析。 首先要识别仪器的杂散噪声和故障性能。 成功与否取决于分析工具能否迅速分离出要纠正的来源。 这也需要对周围环境噪声源进行良好的表征。 随着性能的提高，将探索性能的不可降低的极限。 只有深入了解LIGO数据的特征，才有可能开发新技术来寻找越来越微妙的引力辐射源，并使这些技术适用于测试新的效应和想法。 通过开发工具来理解这些数据，俄勒冈州小组将能够在LIGO实验室委托LIGO之后充分利用LIGO的科学。