Nanopatterned Electron Beams for Coherent Radiation Emission

用于相干辐射发射的纳米图案电子束

• 批准号: 1632780
• 负责人: William Graves
• 金额: $ 52.69万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-08-15 至 2022-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1632780&HistoricalAwards=false
• 关键词: Nanopatterned; Electron; Beams; Coherent; Radiation

This work aims to exploit recent advances in technology to shrink the cost and size of accelerator-based synchrotron radiation facilities to a level appropriate for typical university and industry labs, as well as hospitals. Since their discovery in 1895, x-rays have been the single most powerful technique for determining the structure of all forms of materials. Through increasingly powerful techniques scientists and medical doctors, as well as quality-control inspectors, airline passenger screeners, and forensic investigators have resolved the length scales from the size of an atom to the size of the human body. Every day, that knowledge underpins our modern technologies, our health, and our safety. Today, however, the benchmark for x-ray performance is set by large accelerator-based synchrotron radiation facilities which, due to their size and cost, have to be located in national labs or major university facilities. The goal of this project is to bring the same cutting-edge capability to a smaller and cheaper scale.This research aims to test a disruptive hypothesis that modestly relativistic electron beams can generate and sustain density modulations at x-ray scale. It aims to: (1) develop foundational understanding of diffraction of relativistic beams through experiments with thin slab Si crystals and to create a dynamical beam stop that extinguishes the forward beam; (2) determine the dependence of diffraction parameters on electron beam properties using experiment and simulation derived from first principles; (3) demonstrate that diffraction can result in a nanopatterned beam where Si grating structures and imaging optics are used to establish the density modulation in the patterned beam; (4) demonstrate that the nanopatterned beam retains its density modulation through acceleration with tunable period using a new state-of-the-art Arizona State University (ASU) accelerator facility. This project will facilitate mentorship and training of the next generation of x-ray and accelerator scientists and engineers in the new world class accelerator R&D and x-ray science facility. Dissemination with global reach will be achieved through the Nanopatterned Electron Beams Discovery Mission website, which will host training modules that fortify hands-on instructional classroom outreach programs to middle and high-school students and through K-12 'Science is Fun' program at ASU.

这项工作旨在利用技术的最新进展，以缩小基于加速器的同步辐射设施的成本和规模，从而适合典型的大学和行业实验室以及医院。 自1895年发现以来，X射线一直是确定所有形式材料结构的最强大技术。通过越来越强大的技术，科学家和医生，以及质量控制的检查员，航空公司乘客筛查人员和法医研究人员从原子的大小到人体大小解决了长度尺度。每天，这些知识都支持我们的现代技术，我们的健康和安全。但是，如今，X射线性能的基准是由大型加速器的同步辐射设施设定的，由于其规模和成本，必须位于国家实验室或主要大学设施中。 该项目的目的是将相同的前沿能力带到较小，更便宜的规模。这项研究旨在检验一个破坏性的假设，即适度相对论的电子束可以在X射线规模上产生和维持密度调制。 它的目的是：（1）通过用薄的平板Si晶体实验对相对论束的衍射发展基本理解，并创建一个动态束停止，从而熄灭前向光束； （2）使用实验和仿真，确定衍射参数对电子束性能的依赖性； （3）证明衍射可以导致纳米图案梁，其中使用SI光栅结构和成像光学器件来建立图案梁中的密度调制； （4）证明，使用新的亚利桑那州立大学（ASU）加速器设施，纳米图案梁通过可调节期加速来保留其密度调节。 该项目将促进新世界加速器R＆D和X射线科学设施的下一代X射线和加速器科学家和工程师的指导和培训。将通过纳米图案的电子束发现任务网站来实现与全球范围的传播，该网站将托管培训模块，这些模块可以在中学和高中生和ASU的K-12“ Science IS IS Fun”计划中加强动手教学课堂外展计划。

项目成果

Imaging by intensity interferometry of x-ray fluorescence at a compact x-ray free-electron laser

在紧凑型 X 射线自由电子激光器上通过 X 射线荧光强度干涉成像

• DOI: 10.1103/physreva.104.023514
• 发表时间: 2021
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: Shevchuk, Andrew S.;Spence, John C.;Kirian, Richard A.;Graves, William S.;Schmidt, Kevin E.
• 通讯作者: Schmidt, Kevin E.

Quantitative agreement between dynamical rocking curves in ultrafast electron diffraction for x-ray lasers

• DOI: 10.1016/j.ultramic.2021.113211
• 发表时间: 2021-02-11
• 期刊: ULTRAMICROSCOPY
• 影响因子: 2.2
• 作者: Malin, L. E.;Graves, W. S.;Weathersby, S.
• 通讯作者: Weathersby, S.