Collaborative Research: Center for Coatings Research

合作研究：涂料研究中心

• 批准号: 2309290
• 负责人: Frances Hellman
• 金额: $ 35.35万
• 依托单位: University of California-Berkeley
• 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: 2023-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2309290&HistoricalAwards=false
• 关键词: Collaborative; Research; Center; Coatings

The Center for Coatings Research (CCR) focuses on the development of advanced mirror coatings for gravitational wave detectors, a new and booming field of observational astrophysics. By reducing mechanical loss and thus thermal noise in mirror coatings, the project aims to enhance the sensitivity of Cosmic Explorer (CE), the proposed third generation gravitational wave detector. This research holds significant importance as it expands our understanding of the universe by enabling observations of cosmic events, such as the collision of remnants from the first stars. Moreover, the project has broader impacts on precision measurement technology, benefiting areas like precision timing, quantum information, low noise interferometry, and the search for deviations in the gravitational inverse-square law. The outcomes of this research can also have implications for the semiconductor, laser, and quantum computing communities, as correlations between mechanical loss and other loss mechanisms are explored. Additionally, this collaboration between materials science and gravitational wave communities promotes education and diversity, providing research opportunities for students at different education levels and advancing the participation of women and underrepresented minorities.This project aims to develop mirror coatings that meet the mechanical and optical requirements for implementation in CE. Through extending the length of the interferometer arms from the current 4 km to 20 and/or 40 km systems, CE's observational reach will be significantly expanded. To fully utilize this infrastructure, improvements are necessary in the mirror coatings' mechanical loss and thermal noise reduction. The CCR combines groups working on coating deposition, characterization of atomic structure and macroscopic material properties, and computational modeling. These components are often performed by three diverse communities that work in relative isolation from each other. The strength of the CCR and its promise for accelerating discoveries arises from close integration of these communities focusing on a unified research goal. Since the formation of the CCR in 2017, the collaboration has become a knowledge repository for gravitational wave detector coatings research, making significant progress on all the proposed research directions, including uncovering atomic structural motifs associated with room temperature vs cryogenic mechanical losses, using that understanding to develop Ti:GeO2 coatings that can meet the requirements for Advanced LIGO + (A+). Going forward research efforts include the development of improved amorphous coatings and crystalline AlGaAs coatings. The project will investigate atomic structural motifs associated with mechanical losses at different temperatures, aiming for at least a two-fold reduction in thermal noise compared to Advanced LIGO + coatings. CCR contributions have implications for precision measurement, impacting various fields and potentially benefiting the semiconductor, laser, and quantum computing communities. Overall, this research advances the field of gravitational wave detection, supports education at multiple levels, and promotes diversity within the physical sciences.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.

涂层研究中心 (CCR) 专注于开发用于引力波探测器的先进镜面涂层，这是一个新兴的、蓬勃发展的观测天体物理学领域。通过减少镜面涂层的机械损耗和热噪声，该项目旨在提高拟议的第三代引力波探测器 Cosmic Explorer (CE) 的灵敏度。这项研究具有重要意义，因为它通过观测宇宙事件（例如第一代恒星残骸的碰撞）来扩展我们对宇宙的理解。此外，该项目对精密测量技术具有更广泛的影响，使精密授时、量子信息、低噪声干涉测量以及寻找引力平方反比定律偏差等领域受益。随着机械损耗与其他损耗机制之间的相关性被探索，这项研究的结果也可能对半导体、激光和量子计算领域产生影响。此外，材料科学和引力波界之间的合作促进了教育和多样性，为不同教育水平的学生提供了研究机会，并促进了女性和代表性不足的少数群体的参与。该项目旨在开发满足机械和光学要求的镜面涂层。 CE 中的实施。通过将干涉仪臂的长度从当前的 4 公里系统延长至 20 和/或 40 公里系统，CE 的观测范围将显着扩大。为了充分利用这一基础设施，必须改进镜面涂层的机械损耗和降低热噪声。 CCR 结合了致力于涂层沉积、原子结构表征和宏观材料特性以及计算建模的小组。这些组件通常由三个不同的社区执行，这些社区彼此相对隔离。 CCR 的力量及其加速发现的承诺源于这些社区围绕统一研究目标的紧密结合。自 2017 年 CCR 成立以来，该合作已成为引力波探测器涂层研究的知识库，在所有拟议的研究方向上取得了重大进展，包括利用这种理解揭示与室温和低温机械损失相关的原子结构图案开发满足Advanced LIGO+（A+）要求的Ti:GeO2涂层。未来的研究工作包括开发改进的非晶涂层和结晶 AlGaAs 涂层。该项目将研究与不同温度下的机械损失相关的原子结构图案，目标是与先进的 LIGO + 涂层相比，热噪声至少降低两倍。 CCR 的贡献对精密测量产生影响，影响各个领域，并可能使半导体、激光和量子计算社区受益。总体而言，这项研究推动了引力波探测领域的发展，支持多层次的教育，并促进了物理科学的多样性。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查进行评估，被认为值得支持标准。