Collaborative Research: Study of Anisotropic Dust Interactions in the PK-4 Experiment
合作研究:PK-4 实验中各向异性尘埃相互作用的研究
基本信息
- 批准号:2308743
- 负责人:
- 金额:$ 45.31万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2023
- 资助国家:美国
- 起止时间:2023-06-01 至 2026-05-31
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
This award supports a collaborative effort between Auburn University and Baylor University to study behavior of a complex plasma under microgravity in the PlasmaKristall-4 (PK-4) experiment on the International Space Station. Complex plasmas, also known as dusty plasmas, are collections of micron-sized dust particles immersed in a plasma, or ionized gas. The dust grains typically become charged by collecting electrons and ions on their surface. When dusty plasmas are placed in external electric fields, anisotropic interactions between dust grains and ion flows can lead to the formation of filamentary dust structures. Anisotropic interactions, which depend on the relative orientation of interacting particles, are known to arise in some of the most interesting complex systems, including proteins and smart materials. A fundamental open question in the study of these systems is how anisotropic interactions lead to structure formation. This project addresses this question using a combined analytical, numerical, and experimental approach to investigate how anisotropic interactions lead to structure formation in dusty plasma experiments on the International Space Station (ISS).This project will use data from several PK-4 campaigns to investigate the form and origins of the anisotropic dust-dust interaction potential that leads to the formation of filamentary dusty plasma structures. Data collected from PK-4 experiments will be used to quantify structural anisotropy as a function of plasma conditions using statistical analysis and data-driven methods. Molecular dynamics (MD) simulations of dust and ions will be used to calculate the dust–ion wakefield potential. A machine learning (ML) model will be applied to experimental data to identify the most likely form of the interaction forces as a function of plasma parameters. Interaction forces and potentials learned with the ion-dust MD simulation and the ML model will be applied in MD simulations of larger dust clouds to validate against the experimental data. Experiments in the PK-4 BU device, a ground-based replica of the PK-4 ISS with additional diagnostic capabilities, will be used to determine the relationship between plasma conditions and the onset of plasma ionizations waves. Finally, an analytic model will be employed to determine the spectrum of energy states of the Hamiltonian representing the anisotropic interaction potential. This method will be used to determine the relationship between PK-4 filamentary dusty plasma and other filamentary structures, such as electrorheological materials and liquid crystals.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.
该奖项支持奥本大学和贝勒大学在国际空间站 PlasmaKristall-4 (PK-4) 实验中研究微重力下复杂等离子体的行为。复杂等离子体(也称为尘埃等离子体)是多种等离子体的集合。浸没在等离子体或电离气体中的微米级尘埃颗粒通常通过在其表面收集电子和离子而带电。尘埃颗粒和离子流之间的相互作用会导致丝状尘埃结构的形成,这种相互作用取决于相互作用粒子的相对方向,已知会出现在一些最有趣的复杂系统中,包括蛋白质和智能材料。这些系统研究中的基本开放问题是各向异性相互作用如何导致结构形成,该项目使用分析、数值和实验相结合的方法来解决这个问题,以研究各向异性相互作用如何在国际空间的尘埃等离子体实验中导致结构形成。空间站(国际空间站)。这个项目将使用来自几次 PK-4 活动的数据来研究导致丝状尘埃等离子体结构形成的各向异性尘埃相互作用潜力的形式和起源,从 PK-4 实验中收集的数据将用于量化结构各向异性:使用尘埃和离子的统计分析和数据驱动方法的等离子体条件函数将用于计算尘埃离子尾场电势,并将其应用于实验数据。识别通过离子尘埃 MD 模拟和 ML 模型学习到的相互作用力最可能的形式,作为等离子体参数的函数,将应用于较大尘埃云的 MD 模拟,以根据实验数据进行验证。 PK-4 BU 设备是 PK-4 ISS 的地面复制品,具有额外的诊断功能,将用于确定等离子体条件与等离子体电离波开始之间的关系。最后,将采用分析模型来确定。的频谱代表各向异性相互作用势的哈密顿量的能量状态将用于反映确定PK-4丝状尘埃等离子体与其他丝状结构(例如电流变材料和液晶)之间的关系。该奖项授予NSF的法定使命并具有通过使用基金会的智力优点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
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Lorin Matthews其他文献
Lorin Matthews的其他文献
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{{ truncateString('Lorin Matthews', 18)}}的其他基金
Onset of Turbulence in Dusty Plasma Liquids
尘埃等离子体液体中湍流的开始
- 批准号:
1903450 - 财政年份:2019
- 资助金额:
$ 45.31万 - 项目类别:
Continuing Grant
Dynamics of Strongly Coupled Complex Plasma Systems with Directed Ion Flow
具有定向离子流的强耦合复杂等离子体系统的动力学
- 批准号:
1707215 - 财政年份:2017
- 资助金额:
$ 45.31万 - 项目类别:
Continuing Grant
Collaborative Research: Fundamental Charging Processes of Dust in Complex Plasmas
合作研究:复杂等离子体中灰尘的基本充电过程
- 批准号:
1414523 - 财政年份:2014
- 资助金额:
$ 45.31万 - 项目类别:
Continuing Grant
CAREER: Charging and Coagulation of Dust Grains I Astrophysical and Laboratory Environments
职业:尘埃颗粒的充电和凝结 I 天体物理和实验室环境
- 批准号:
0847127 - 财政年份:2009
- 资助金额:
$ 45.31万 - 项目类别:
Continuing Grant
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