Data from: Data-driven analysis of oscillations in Hall thruster simulations & Data-driven sparse modeling of oscillations in plasma space propulsion

Data from: Data-driven analysis of oscillations in Hall thruster simulations - Authors: Davide Maddaloni, Adrián Domínguez Vázquez, Filippo Terragni, Mario Merino - Contact email: [e-mail] - Date: 2022-03-24 - Keywords: higher order dynamic mode decomposition, hall effect thruster, breathing mode, ion transit time, data-driven analysis - Version: 1.0.4 - Digital Object Identifier (DOI): 10.5281/zenodo.6359505 - License: This dataset is made available under the Open Data Commons Attribution License Abstract This dataset contains the outputs of the HODMD algorithm and the original simulations used in the journal publication: Davide Maddaloni, Adrián Domínguez Vázquez, Filippo Terragni, Mario Merino, "Data-driven analysis of oscillations in Hall thruster simulations", 2022 Plasma Sources Sci. Technol. 31:045026. Doi: 10.1088/1361-6595/ac6444. Additionally, the raw simulation data is also employed in the following journal publication: Borja Bayón-Buján and Mario Merino, "Data-driven sparse modeling of oscillations in plasma space propulsion", 2024 Mach. Learn.: Sci. Technol. 5:035057. Doi: 10.1088/2632-2153/ad6d29 Dataset description The simulations from which data stems have been produced using the full 2D hybrid PIC/fluid code HYPHEN, while the HODMD results have been produced using an adaptation of the original HODMD algorithm with an improved amplitude calculation routine. Please refer to the relative article for further details regarding any of the parameters and/or configurations. Data files The data files are in standard Matlab .mat format. A recent version of Matlab is recommended. The HODMD outputs are collected within 18 different files, subdivided into three groups, each one referring to a different case. For the file names, "case1" refers to the nominal case, "case2" refers to the low voltage case and "case3" refers to the high mass flow rate case. Following, the variables are referred as: "n" for plasma density "Te" for electron temperature "phi" for plasma potential "ji" for ion current density (both single and double charged ones) "nn" for neutral density "Ez" for axial electric field "Si" for ionization production term "vi1" for single charged ions axial velocity In particular, axial electric field, ionization production term and single charged ions axial velocity are available only for the first case. Such files have a cell structure: the first row contains the frequencies (in Hz), the second row contains the normalized modes (alongside their complex conjugates), the third row collects the growth rates (in 1/s) while the amplitudes (dimensionalized) are collected within the last row. Additionally, the time vector is simply given as "t", common to all cases and all variables. The raw simulation data are collected within additional 15 variables, following the same nomenclature as above, with the addition of the suffix "_raw" to differentiate them from the HODMD outputs. Citation Works using this dataset or any part of it in any form shall cite it as follows. The preferred means of citation is to reference the publication associated to this dataset, as soon as it is available. Optionally, the dataset may be cited directly by referencing the DOI: 10.5281/zenodo.6359505. Acknowledgments This work has been supported by the Madrid Government (Comunidad de Madrid) under the Multiannual Agreement with UC3M in the line of ‘Fostering Young Doctors Research’ (MARETERRA-CM-UC3M), and in the context of the V PRICIT (Regional Programme of Research and Technological Innovation). F. Terragni was also supported by the Fondo Europeo de Desarrollo Regional, Ministerio de Ciencia, Innovación y Universidades - Agencia Estatal de Investigación, under grants MTM2017-84446-C2-2-R and PID2020-112796RB-C22.数据来源：《霍尔推力器模拟中的振荡数据驱动分析》 - 作者：Davide Maddaloni、Adrián Domínguez Vázquez、Filippo Terragni、Mario Merino - 联系邮箱：[e-mail] - 日期：2022年3月24日 - 关键词：高阶动态模态分解（higher order dynamic mode decomposition）、霍尔效应推力器（Hall effect thruster）、呼吸模式（breathing mode）、离子渡越时间（ion transit time）、数据驱动分析 - 版本：1.0.4 - 数字对象标识符（DOI）：10.5281/zenodo.6359505 - 许可协议：本数据集采用开放数据通用署名许可（Open Data Commons Attribution License）发布。 摘要 本数据集包含发表于期刊论文《Davide Maddaloni、Adrián Domínguez Vázquez、Filippo Terragni、Mario Merino，“霍尔推力器模拟中的振荡数据驱动分析”，2022 等离子体源科学与技术（Plasma Sources Sci. Technol.）31:045026，DOI: 10.1088/1361-6595/ac6444》中所用的高阶动态模态分解（higher order dynamic mode decomposition，简称HODMD）算法输出结果与原始模拟数据。此外，本数据集的原始模拟数据还被用于另一篇期刊论文：Borja Bayón-Buján与Mario Merino，“等离子体空间推进振荡的数据驱动稀疏建模”，2024 机器学习：科学与技术（Mach. Learn.: Sci. Technol.）5:035057，DOI: 10.1088/2632-2153/ad6d29。 数据集描述 本数据集所用的模拟数据由全二维混合粒子网格（Particle-in-Cell，简称PIC）/流体代码HYPHEN生成，而HODMD结果则通过改进了振幅计算流程的原版HODMD算法适配版本生成。有关参数与配置的详细信息，请参阅相关学术论文。 数据文件 数据文件采用标准Matlab .mat格式，推荐使用较新版本的Matlab进行读取。HODMD输出结果共分为18个不同文件，划分为三组，每组对应一种不同的工况。文件名中，“case1”指代标准工况，“case2”指代低电压工况，“case3”指代高质量流量工况。各变量命名规则如下： "n" 表示等离子体密度，"Te" 表示电子温度，"phi" 表示等离子体电势，"ji" 表示离子电流密度（包含单电荷与双电荷离子），"nn" 表示中性粒子密度，"Ez" 表示轴向电场，"Si" 表示电离产生项，"vi1" 表示单电荷离子轴向速度。 其中，轴向电场、电离产生项与单电荷离子轴向速度仅在第一组工况文件中提供。这些文件采用元胞数组结构：第一行存储频率（单位：Hz），第二行存储归一化模态（及其复共轭），第三行存储增长率（单位：1/s），最后一行存储量纲化后的振幅。此外，所有工况与变量共用的时间向量以变量名"t"单独给出。 原始模拟数据包含额外15个变量，命名规则与上述一致，但添加后缀"_raw"以区分于HODMD输出结果。 引用 任何以任何形式使用本数据集或其部分内容的作品，需按以下方式进行引用。首选引用方式为引用本数据集关联的正式期刊论文（若已公开）。也可直接通过引用DOI：10.5281/zenodo.6359505来引用本数据集。 致谢 本研究得到马德里政府（Comunidad de Madrid）资助，通过与马德里卡洛斯三世大学（UC3M）的多年合作协议，在“扶持青年博士研究”（MARETERRA-CM-UC3M）框架下开展，并隶属于第五期区域研究与技术创新计划（V PRICIT）。F. Terragni的研究还得到了欧洲区域发展基金、西班牙科学与创新部-国家研究局的资助，项目编号为MTM2017-84446-C2-2-R与PID2020-112796RB-C22。