High Fidelity Modeling of Laser-Plasma Accelerators

激光等离子体加速器的高保真度建模

• 批准号: 1535678
• 负责人: Bradley Shadwick
• 金额: $ 45万
• 依托单位: University of Nebraska-Lincoln
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1535678&HistoricalAwards=false
• 关键词: Fidelity; Modeling; Laser; Plasma; Accelerators

The goal of this project is to advance the development of compact, next-generation light sources and other laser-based accelerators. Laser-plasma acceleration is a key enabling technology for a new generation of compact particle and radiation sources, but the existing theoretical understanding of the processes governing electron beam formation in such accelerators is incomplete. Further advances require development of computational tools with high physical fidelity, which is the expected outcome of this project. The project will aid in workforce development at all levels by providing training in the basic physics underlying advanced accelerator technologies. The research is expected to benefit society as a whole primarily through advancement of accelerator technologies based on plasma physics. Knowledge gained in this project will aid the effort to realize the technological promise of various laser-plasma accelerators with a wide range of applications from high-energy physics, astrophysics, and nuclear science to medicine, biology, and chemistry.This project will result in the development of improved numerical models suitable for understanding the physics of electron beam formation and evolution in a large class of laser-plasma accelerators. This includes the development of a new two-dimensional Eulerian Vlasov-Maxwell simulation code. Comparisons of results from the new Vlasov-Maxwell solver and predictions of various particle methods will be used to identify regions of validity of the particle methods and to determine the key physical processes involved in electron beam formation and the origins of dark current in laser-plasma accelerators. The project will focus on studying electron beam formation in the bubble (or blow-out) regime. The results of this study will also inform the development of high-fidelity three-dimensional computational tools suitable for designing both near-term experiments and future facilities.

该项目的目标是推进紧凑型下一代光源和其他基于激光的加速器的开发。激光等离子体加速是新一代紧凑粒子和辐射源的关键使能技术，但现有的理论理解在这样的加速器中的电子束形成的过程是不完整的。 进一步的进步需要开发具有高度物理保真度的计算工具，这是该项目的预期成果。 该项目将通过提供先进加速器技术基础物理方面的培训，帮助各级劳动力发展。 该研究预计将主要通过基于等离子体物理学的加速器技术的进步来造福整个社会。本计画所获得的知识将有助于实现各种雷射电浆加速器的技术前景，其应用范围从高能物理、天体物理、核子科学到医学、生物学、化学，本计画将导致发展改良的数值模式，适合了解大类雷射电浆加速器中电子束形成与演化的物理。 这包括一个新的二维欧拉符拉索夫-麦克斯韦模拟代码的发展。 新的Vlasov-Maxwell解算器和各种粒子方法的预测结果的比较将用于识别粒子方法的有效性区域，并确定电子束形成中涉及的关键物理过程和激光等离子体加速器中暗电流的起源。 该项目将侧重于研究气泡（或吹出）状态下的电子束形成。 这项研究的结果还将为开发适用于设计近期实验和未来设施的高保真三维计算工具提供信息。