RUI -- Further Optical Charge Studies with the Trinity University Kelvin Probe

RUI——利用三一大学开尔文探针进行进一步的光电荷研究

• 批准号: 1068760
• 负责人: Dennis Ugolini
• 金额: $ 12.66万
• 依托单位: Trinity University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1068760&HistoricalAwards=false
• 关键词: RUI; Further; Optical; Charge; Studies

The Laser Interferometer Gravitational-Wave Observatory (LIGO) is most sensitive to gravitational waves at signal frequencies near 100 Hz. One potential noise source at these frequencies is the motion of surface charge on optics, which can be generated through abrasive contact with dust, contact with other materials, or possibly from polarization by an electrostatic drive. Charge contributes noise by interfering with the position control of optics, attracting dust to the optical surface, and generating fluctuating electric fields. The noise contribution depends on the charge magnitude and the correlation time for charge motion. Reasonable values for these quantities suggest that charging might be a limiting noise source for Advanced LIGO. This award supports a research program with the goal of exploring the underlying physics of dielectric charging and methods to mitigate its impact on Advanced LIGO. The laboratory at Trinity University developed by the PI through prior NSF support will be used for a number of experiments including various ways Advanced LIGO components might produce electrostatic charging, testing methods to mitigate the charging, and studying how charging actually produces noise in gravitational wave detectors. This research could be of crucial importance to Advanced LIGO, due to the charge noise witnessed at LIGO Livingston Observatory in 2006 and the recent discovery of charging from exposure to an electrode similar to one of those in Advanced LIGO. The research is also important for other existing, future, and envisioned ground-based gravitational wave interferometers in order to reduce noise in their most sensitive frequency range. In addition, continued charging research at Trinity University provides a real-word research experience to undergraduates in a cutting-edge field; over a dozen Trinity students have participated in LIGO-related projects and theses, have been published authors, have presented their results at state and national meetings, have won awards for their accomplishments, and have moved on to successful physics-related careers.

激光干涉引力波天文台（LIGO）对信号频率接近100 Hz的引力波最为敏感。在这些频率下的一个潜在噪声源是光学器件上的表面电荷的运动，其可以通过与灰尘的摩擦接触、与其他材料的接触或可能通过静电驱动的极化而产生。电荷通过干扰光学器件的位置控制、将灰尘吸引到光学表面以及产生波动电场来贡献噪声。噪声的贡献取决于电荷的大小和电荷运动的相关时间。这些量的合理值表明，充电可能是Advanced LIGO的限制噪声源。该奖项支持一项研究计划，其目标是探索电介质充电的基础物理学以及减轻其对Advanced LIGO影响的方法。PI通过先前的NSF支持开发的Trinity大学实验室将用于许多实验，包括高级LIGO组件可能产生静电充电的各种方式，减轻充电的测试方法，以及研究充电实际上如何在引力波探测器中产生噪声。这项研究可能对Advanced LIGO至关重要，因为2006年在LIGO利文斯顿天文台目睹了电荷噪声，最近发现暴露在与Advanced LIGO类似的电极上充电。这项研究对其他现有的、未来的和设想中的地基引力波干涉仪也很重要，以便减少其最敏感频率范围内的噪声。此外，在Trinity大学继续充电研究提供了一个真实的词研究经验，本科生在一个前沿领域;十几个Trinity学生参加了LIGO相关的项目和论文，已出版的作者，在州和国家会议上展示了他们的成果，赢得了他们的成就奖，并已转移到成功的物理学相关的职业生涯。