Elements: Entity: Radiative General-Relativistic Particle-in-cell Toolkit for Extreme Plasma Astrophysics

元素：实体：用于极端等离子体天体物理学的辐射广义相对论细胞内粒子工具包

• 批准号: 2311800
• 负责人: Alexander Philippov
• 金额: $ 60万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2026-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2311800&HistoricalAwards=false
• 关键词: Elements; Entity; Radiative; General; Relativistic

The computational modeling efforts of extreme plasma phenomena around the most exotic objects in the Universe -- the black holes and the neutron stars -- are growing at an unprecedented rate both in terms of the scales of the simulations and in terms of their complexity. Nonetheless, the current state of the simulation frameworks fails to meet the growing interest in the field. The development of new computational tools is the primary agenda of this proposal. This award aims to produce an open-source, user-friendly, and easily accessible software toolkit used to investigate the dynamics and radiation of extreme plasmas on a variety of platforms varying from laptops to high-performance computing hardware, including the exascale national supercomputers and GPU clusters. The key aspect of the toolkit is its ease of use out-of-the-box, which is crucial for educating newcomers in the field, while still offering high-enough customizability to facilitate the more demanding state-of-the-art research. The project will provide training for undergraduate and graduate students through semester-long or year-long projects at the University of Maryland and will sponsor a postdoctoral scholar, who will be involved in the active development process.This award leads to advances in extreme plasma astrophysics -- a frontier in plasma physics research aiming at understanding fundamental plasma processes in the vicinity of astrophysical compact objects, where the interaction of charged particles with the produced radiation is important. To describe the systems of interest, the team develops Entity, a radiative general-relativistic particle-in-cell code, available in several different grid geometries (Cartesian or flexible curvilinear coordinate systems, including the cubed sphere grid, both special and general-relativistic). Entity is going to be equipped with a module capable of simulating all the astrophysically-necessary QED-plasma interaction processes, and a continuum solver using a semi-Lagrangian numerical scheme. During the three-year grant period, PI and collaborators plan to organize a set of training camps (both in-person at participating institutions and using Zoom webinars available to a broader community). These sessions and lectures will cover aspects of extreme plasma astrophysics and focus on basic practices for interacting with Entity. In addition, a postdoctoral scholar and graduate students supported by this project will receive extensive professional, educational, and equity, diversity, and inclusion training, including transferable skills acquired through work on this project. This project advances the objectives of "Windows on the Universe: the Era of Multi-Messenger Astrophysics", one of the 10 Big Ideas for Future NSF Investments.This award by the Office of Advanced Cyberinfrastructure is jointly supported by the Physics at the Information Frontier program in the Division of Physics within the Directorate for Mathematical and 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.

极端等离子体现象围绕宇宙中最外来物体的计算建模工作 - 黑洞和中子星 - 在模拟的尺度和复杂性方面都以前所未有的速率生长。尽管如此，模拟框架的当前状态仍无法满足该领域日益增长的兴趣。新计算工具的开发是该提案的主要议程。该奖项旨在生产开源，用户友好且易于访问的软件工具包，用于调查从笔记本电脑到高性能计算硬件的各种平台上极端等离子体的动态和辐射，包括Exascale国家超级计算机和GPU簇。该工具包的关键方面是其易于使用的易于使用，这对于对该领域的新移民进行教育至关重要，同时仍然提供高功能的可定制性来促进更苛刻的最先进的研究。 The project will provide training for undergraduate and graduate students through semester-long or year-long projects at the University of Maryland and will sponsor a postdoctoral scholar, who will be involved in the active development process.This award leads to advances in extreme plasma astrophysics -- a frontier in plasma physics research aiming at understanding fundamental plasma processes in the vicinity of astrophysical compact objects, where the interaction of charged particles with产生的辐射很重要。为了描述感兴趣的系统，团队开发实体，一种辐射性的一般性相关粒子中的粒子代码，可在几种不同的网格几何形状（笛卡尔或灵活的曲线坐标系，包括立方体球网，既有特殊和普通偏爱主义）。实体将配备能够模拟所有天体本质上QED QED QED互动过程的模块，并使用半拉格朗日数值方案进行连续求解器。在为期三年的赠款期间，PI和合作者计划组织一组培训营（既在参与机构进行面对面，又使用更广泛社区的Zoom Webinas）。这些会议和讲座将涵盖极端血浆天体物理学的各个方面，并专注于与实体互动的基本实践。此外，该项目支持的博士后学者和研究生将获得广泛的专业，教育和公平，多样性和包容性培训，包括通过该项目的工作获得的可转移技能。该项目推动了“宇宙窗口：多吸引天体物理学的时代”的目标，这是未来NSF投资的10个重要想法之一。该奖项由高级网络基础设施办公室奖，由高级网络基础设施办公室颁发，由物理学在Information Frontier计划的物理学局共同支持，在数学和物理科学范围内的物理局长。使用基金会的智力优点和更广泛的影响评估标准进行评估。