Data from: Data-driven analysis of oscillations in Hall thruster simulations

## Abstract

This dataset contains the outputs of the HODMD algorithm and the original simulations used in:

_[Davide Maddaloni, Adrián Domínguez Vázquez, Filippo Terragni, Mario Merino, "Data-driven analysis of oscillations in Hall thruster
simulations", Plasma Sources Science and Technology]_

Which is currently in the final stages of the review process.

## Dataset description

The simulations from which data stems have been produced using the full 2D hybrid PIC/fluid code HYPHEN [Domínguez-Vázquez, Adrián, et al. "Analysis of the plasma discharge in a Hall thruster via a hybrid 2D code."], while the HODMD results have been produced using an adaptation of the original HODMD algorithm [https://doi.org/10.1137/15M1054924] with an improved amplitude calculation routine [https://doi.org/10.1063/1.4863670].

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 low 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.

## 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.6359506].

## Acknowledgments

This work has been supported by the Madrid Government (Comunidad de Madrid) un-
der 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 Re-
search 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.