High Fidelity Fluid-Kinetic Hybrid Modeling of Intense, Short Pulse Laser Plasma Interactions

该项目致力于开发新的计算工具，用于研究激光等离子体加速器，以合理的计算成本实现高物理保真度。关键因素是使用多个物理模型，每个模型都经过调整以准确地代表特定的等离子体过程。该项目包括开发新的二维模拟代码，用于确定激光等离子体加速器中电子束形成的关键物理过程。在这个项目中获得的知识将有助于实现激光等离子体加速器的技术前景，从高能物理学、天体物理学、核科学到医学、生物学和化学，都有广泛的应用。此外，该项目具有重要的教育组成部分，并将通过提供基本等离子体物理学和先进加速器技术基础物理学的培训来帮助劳动力发展。激光等离子体加速是新一代致密粒子和辐射源的关键使能技术。相空间的详细操作将导致先进加速器的进一步革命。实现这些进步需要利用激光等离子体加速器的前景，并了解这些系统的相空间动力学的第一性原理。对相空间过程的清晰和完整的理解为相空间的操纵和对电子束参数的更好的控制打开了大门。高保真计算工具对于发展这种理解至关重要。多物理场方法根据系统行为改变模型的物理内容，允许高精度，同时将计算成本保持在可管理的水平。强激光等离子体相互作用的许多技术应用，如紧凑的下一代光源，对光束质量有严格的限制，超过目前可用的。本研究结果有望推动这些技术的发展，最终在广泛的领域得到应用。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

The project is dedicated to the development of new computational tools for studying laser-plasma accelerators that achieve high physical fidelity at reasonable computational cost. The key element is the use of multiple physics models, each tuned to accurately represent particular plasma processes. The project includes the development of new two-dimensional simulation codes which will be used to determine the key physical processes involved in electron beam formation in laser-plasma accelerators. Knowledge gained in this project will aid the effort to realize the technological promise of laser-plasma accelerators with a wide range of applications from high-energy physics, astrophysics, and nuclear science to medicine, biology, and chemistry. Additionally, this project has an important educational component and will aid in workforce development by providing training in the basic plasma physics and the physics underlying advanced accelerator technologies.Laser-plasma acceleration is a key enabling technology for a new generation of compact particle and radiation sources. Detailed manipulation of phase space will lead to a further revolution in advanced accelerators. Realizing these advances requires exploiting the promise of laser-plasma accelerators with a first principles understanding of the phase-space dynamics of these systems. Clear and complete understanding of phase-space processes opens the door to the manipulation of phase space and to greater control over the electron beam parameters. High-fidelity computational tools are essential to developing this understanding. Multi-physics approaches alter the physics content of the models, depending on the system behavior, allowing for high accuracy while keeping the computational cost to manageable levels. Many of the technological applications of intense-laser plasma interactions, such as compact, next-generation light sources, have stringent limits on beam quality that exceed what is currently available. The results of this study are expected to advance the development of these technologies, having ultimate applications in a wide range of fields.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.