Mid-scale RI-1 (M1:IP): NSF National EXtreme Ultrafast Science (NEXUS) Facility

中型 RI-1 (M1:IP)：NSF 国家极限超快科学 (NEXUS) 设施

• 批准号: 1935885
• 负责人: Lawrence Baker
• 金额: $ 950万
• 依托单位: Ohio State University
• 依托单位国家: 美国
• 项目类别: Cooperative Agreement
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-10-01 至 2025-09-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1935885&HistoricalAwards=false
• 关键词: Mid; scale; RI; M1; IP

With support from the NSF Division of Chemistry through the Mid-scale Research Infrastructure-1 program, a team led by Robert Baker at The Ohio State University (OSU) is implementing the NSF National EXtreme Ultrafast Science (NEXUS) Facility - a beyond-the-state-of-the-art national XUV light source to serve the scientific and engineering communities as an open-access user facility. This light source will be coupled to a versatile array of experimental capabilities, designed to facilitate transformative progress in areas of national priority with emphasis on energy conversion and quantum information science. This national facility brings new technology in high-power lasers to the US for the first time. This mid-scale infrastructure bridges the gap between tabletop instruments and large-scale facilities such as free electron lasers and synchrotrons. This facility also brings new capabilities to the broader community and contributes to US competitiveness in the global landscape. Upon completion, the facility will be available to researchers seeking new insights across chemistry, physics, materials science, and other disciplines. At the heart of this facility is a new laser technology for producing extreme ultraviolet and soft x-ray photon energies at repetition rates of hundreds of kilohertz with average power exceeding one kilowatt. The combination of attosecond time resolution, high energies, and high repetition rates enables measurements that currently cannot be made with existing technology in a laboratory setting. The facility will provide the following experimental platforms with attosecond to femtosecond time resolution, depending on the experiment: 1) X-Ray Absorption/Reflection Spectroscopy, 2) X-Ray Magnetic Circular Dichroism, 3) Scanning Tunneling Microscopy, 4) Angle-Resolved Photoemission Spectroscopy, and 5) Laser-Induced Electron Diffraction. Applications include such scientific challenges as biomimetic photosynthesis and new quantum information technologies. Enabling these applications is the ability to control matter at the scale of individual electrons and atoms in systems that are far from equilibrium. This project directly responds to community-identified grand challenges requiring observation of charge and spin transport in relevant materials on the attosecond timescale with sub-nanometer spatial resolution.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.

俄亥俄州立大学(OSU)罗伯特·贝克(Robert Baker)领导的一个团队通过中等规模研究基础设施计划(Meid-Scale Research Infrastructure-1)，在NSF化学部门的支持下，正在实施NSF国家极端超快科学(Nexus)设施--一种超越最先进水平的国家XUV光源，作为开放访问用户设施服务于科学和工程界。这种光源将与一系列多功能的实验能力相结合，旨在促进国家优先领域的变革性进展，重点是能量转换和量子信息科学。这个国家设施首次将高功率激光的新技术带到了美国。这一中等规模的基础设施弥合了桌面仪器和大型设施(如自由电子激光和同步加速器)之间的差距。这一设施还为更广泛的社区带来了新的能力，并有助于提高美国在全球格局中的竞争力。建成后，该设施将向寻求化学、物理、材料科学和其他学科的新见解的研究人员开放。该设施的核心是一种新的激光技术，用于以数百千赫的重复频率产生极端紫外线和软X射线光子能量，平均功率超过1千瓦。阿秒时间分辨率、高能量和高重复率的组合使目前无法在实验室环境中使用现有技术进行的测量成为可能。该设施将为以下实验平台提供阿秒到飞秒的时间分辨率，具体取决于实验：1)X射线吸收/反射光谱，2)X射线磁性圆二色，3)扫描隧道显微镜，4)角度分辨光电发射光谱，5)激光诱导电子衍射。应用包括诸如仿生光合作用和新的量子信息技术等科学挑战。实现这些应用的能力是在远离平衡的系统中控制单个电子和原子级别的物质的能力。该项目直接回应了社区确定的重大挑战，要求以亚纳米空间分辨率在阿秒时间尺度上观察相关材料中的电荷和自旋输运。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Sub-two-cycle gigawatt-peak-power LWIR OPA for ultrafast nonlinear spectroscopy of condensed state materials

用于凝聚态材料超快非线性光谱的亚二周期千兆瓦峰值功率长波红外 OPA

• DOI: 10.1364/ol.500550
• 发表时间: 2023
• 期刊: Optics Letters
• 影响因子: 3.6
• 作者: Leshchenko, Vyacheslav;Li, Sha;Agostini, Pierre;DiMauro, Louis F.
• 通讯作者: DiMauro, Louis F.

Extreme Ultraviolet Reflection-Absorption (XUV-RA) Spectroscopy: Probing Dynamics at Surfaces from a Molecular Perspective

极紫外反射吸收 (XUV-RA) 光谱：从分子角度探测表面动力学

• DOI: 10.1021/acs.accounts.1c00765
• 发表时间: 2022
• 期刊: Accounts of chemical research
• 影响因子: 18.3
• 作者: Biswas, Somnath;Baker, L. Robert
• 通讯作者: Baker, L. Robert