Formation mechanisms of striations in a filamentary dielectric barrier discharge in atmospheric pressure argon - datasetThe results of the modelling of a filamentary dielectric barrier discharge (DBD) in argon at atmospheric pressure obtained using a time-dependent and spatially two-dimensional fluid-Poisson model in axisymmetric geometry are provided in this dataset. The model was employed to investigate the formation mechanisms of the striations along the discharge channel in a one-sided DBD arrangement with a 1.5 mm gap powered by a sinusoidal high voltage applied at the metal electrode. The discharge conditions were chosen to resemble the experimental conditions for which striations have been observed. It was found that the striations form in both half-periods during the transient glow phase, which follows the streamer breakdown phase. The modelling results showed that the distinct striated structures feature local spatial maxima and minima in charged and excited particle densities, which were more pronounced during the positive polarity. Their formation was explained by a repetitive stepwise ionisation of metastable argon atoms and ionisation of excimers, causing a disturbance of the spatial distribution of charge carriers along the discharge channel. The results emphasise the importance of excited states and stepwise ionisation processes on the formation of repetitive ionisation waves, eventually leading to striations along the discharge channel.

]]>DBDfluid modellingstreamer dischargestriationsPlasma Chemical Processes635c4fbc-f299-48c1-a843-c6dced54cf4c2023-04-25T12:00:04+02:002023-05-09T21:47:44+02:00enINP, MUNI SCI PDMFormation mechanisms of striations in a filamentary DBD in atmospheric pressure Ar-Fig.2The file contains the two datasets with temporal evolution of the electric current and voltages and spatiotemporal evolution of the electron number density and reduced electric field. Due to their size, the data are saved in binary hdf5 file. The file can be opened using any program that supports opening hdf5 files, such as HDF Viewer, Origin Pro, Matlab, or various libraries in Python. The current and voltage data are stored in a table where the first column is the time, the second, third and fourth columns are the applied, gap and memory voltages, respectively, and the last column is the electric current. The spatiotemporal evolution of the field is given in as a three-column form table in which for a given time in the first column all axial positions are varied in the second column, and the third and fourth columns contain the number density of electrons and the reduced electric field at the given time and position.

Dataset1: 'Figure2_a'
Size: 8546
Structured array:
column 1: 't [s]': H5T_IEEE_F64LE (double)
column 2: 'applied voltage [V]': H5T_IEEE_F64LE (double)
column 3: 'gap voltage [V]': H5T_IEEE_F64LE (double)
column 4: 'memory voltage [V]': H5T_IEEE_F64LE (double)
column 5: 'current [A]': H5T_IEEE_F64LE (double)

Dataset2: 'Figure2_b-c':
Size: 264528
Structured array:
column 1: 't [s]': H5T_IEEE_F64LE (double)
column 2: 'z [m]': H5T_IEEE_F64LE (double)
column 3: '[e] [m^-3]': H5T_IEEE_F64LE (double)
column 4: 'reduced electric field [Td]': H5T_IEEE_F64LE (double)

Note that the same data zoomed into different time ranges was presented in Figures 3 and 12.

]]>2023-04-25T10:29:54+02:002023-04-25T15:20:48+02:00application/octet-streamdata8808784https://gitlab.inptdat.de/dataset/formation-mechanisms-striations-filamentary-dielectric-barrier-discharge-atmospheric-0Formation mechanisms of striations in a filamentary DBD in atmospheric pressure Ar-Fig.4The spatial profiles of the electron number density for three characteristic times during the streamer phase. Due to their size, the data are saved in binary hdf5 file. The file can be opened using any program that supports opening hdf5 files, such as HDF Viewer, Origin Pro, Matlab, or various libraries in python. The data are stored as a three-column form table in which the radial position in the first column is varied for each axial position in the second column and the following columns contain the number density of electrons for corresponding positions at the given times. Note that NaN data occur for the spatial points outside the computational domain.

Dataset: 'Figure4_a-c'
Size: 777051
Structured array:
column 1: 'r [m]': H5T_IEEE_F64LE (double)
column 2: 'z [m]': H5T_IEEE_F64LE (double)
column 3: '[e] [m^-3] at 50.40 microseconds': H5T_IEEE_F64LE (double)
column 4: '[e] [m^-3] at 50.48 microseconds': H5T_IEEE_F64LE (double)
column 5: '[e] [m^-3] at 50.50 microseconds': H5T_IEEE_F64LE (double)

]]>2023-04-25T10:51:38+02:002023-04-25T15:20:48+02:00application/octet-streamdata31086136https://gitlab.inptdat.de/dataset/formation-mechanisms-striations-filamentary-dielectric-barrier-discharge-atmospheric-1Formation mechanisms of striations in a filamentary DBD in atmospheric pressure Ar-Fig.5Spatial profiles of the number densities of all included particle species, and mean electron energy along the symmetry axis at three characteristic times during the streamer phase. The table contains the axial position in the first column, and number densities of the particles and the mean electron energy for each time in the following columns.

column 1: 'z [m]'
column 2: '[Ar^*] [m^-3] at 50.40 microseconds'
column 3: '[Ar^+] [m^-3] at 50.40 microseconds'
column 4: '[Ar_2^*] [m^-3] at 50.40 microseconds'
column 5: '[Ar_2^+] [m^-3] at 50.40 microseconds'
column 6: '[e] [m^-3] at 50.40 microseconds'
column 7: 'u_e [eV] at 50.40 microseconds'
column 8: '[Ar^*] [m^-3] at 50.48 microseconds'
column 9: '[Ar^+] [m^-3] at 50.48 microseconds'
column 10: '[Ar_2^*] [m^-3] at 50.48 microseconds'
column 11: '[Ar_2^+] [m^-3] at 50.48 microseconds'
column 12: '[e] [m^-3] at 50.48 microseconds'
column 13: 'u_e [eV] at 50.48 microseconds'
column 14: '[Ar^*] [m^-3] at 50.50 microseconds'
column 15: '[Ar^+] [m^-3] at 50.50 microseconds'
column 16: '[Ar_2^*] [m^-3] at 50.50 microseconds'
column 17: '[Ar_2^+] [m^-3] at 50.50 microseconds'
column 18: '[e] [m^-3] at 50.50 microseconds'
column 19: 'u_e [eV] at 50.50 microseconds'

]]>2023-04-25T11:24:36+02:002023-04-25T15:20:48+02:00text/csvcsv134139https://gitlab.inptdat.de/dataset/formation-mechanisms-striations-filamentary-dielectric-barrier-discharge-atmospheric-2Formation mechanisms of striations in a filamentary DBD in atmospheric pressure Ar-Fig.6Spatial profiles of the rates of electron production, and reduced electric field along the symmetry axis at three characteristic times during the streamer phase. The table contains the axial position in the first column, and rates and the reduced electric field for each time in the following columns.

column 1: 'z [m]'
column 2: 'direct ionsiation [m^-3 s^-1] at 50.40 microseconds'
column 3: 'stepwise ionisation [m^-3 s^-1] at 50.40 microseconds'
column 4: 'excimer ionsiation [m^-3 s^-1] at 50.40 microseconds'
column 5: 'chemo-ionisation [m^-3 s^-1] at 50.40 microseconds'
column 6: 'dissociative recombination [m^-3 s^-1] at 50.40 microseconds'
column 7: 'reduced electric field [Td] at 50.40 microseconds'
column 8: 'direct ionsiation [m^-3 s^-1] at 50.48 microseconds'
column 9: 'stepwise ionisation [m^-3 s^-1] at 50.48 microseconds'
column 10: 'excimer ionsiation [m^-3 s^-1] at 50.48 microseconds'
column 11: 'chemo-ionisation [m^-3 s^-1] at 50.48 microseconds'
column 12: 'dissociative recombination [m^-3 s^-1] at 50.48 microseconds'
column 13: 'reduced electric field [Td] at 50.48 microseconds'
column 14: 'direct ionsiation [m^-3 s^-1] at 50.50 microseconds'
column 15: 'stepwise ionisation [m^-3 s^-1] at 50.50 microseconds'
column 16: 'excimer ionsiation [m^-3 s^-1] at 50.50 microseconds'
column 17: 'chemo-ionisation [m^-3 s^-1] at 50.50 microseconds'
column 18: 'dissociative recombination [m^-3 s^-1] at 50.50 microseconds'
column 19: 'reduced electric field [Td] at 50.50 microseconds'

]]>2023-04-25T11:40:11+02:002023-04-25T15:20:48+02:00text/csvcsv240468https://gitlab.inptdat.de/dataset/formation-mechanisms-striations-filamentary-dielectric-barrier-discharge-atmospheric-3Formation mechanisms of striations in a filamentary DBD in atmospheric pressure Ar-Fig.7The spatial profiles of the electron number density for four characteristic times during the transient glow phase. Due to their size, the data are saved in binary hdf5 file. The file can be opened using any program that supports opening hdf5 files, such as HDF Viewer, Origin Pro, Matlab, or various libraries in python. The data are stored as a three-column form table in which the radial position in the first column is varied for each axial position in the second column and the following columns contain the number density of electrons for corresponding positions at the given times. Note that NaN data occur for the spatial points outside the computational domain.

Dataset: 'Figure7_a-d'
Size: 777051
Structured array:
column 1: 'r [m]': H5T_IEEE_F64LE (double)
column 2: 'z [m]': H5T_IEEE_F64LE (double)
column 3: '[e] [m^-3] at 51.1 microseconds': H5T_IEEE_F64LE (double)
column 4: '[e] [m^-3] at 51.6 microseconds': H5T_IEEE_F64LE (double)
column 5: '[e] [m^-3] at 51.8 microseconds': H5T_IEEE_F64LE (double)
column 6: '[e] [m^-3] at 52.0 microseconds': H5T_IEEE_F64LE (double)

]]>2023-04-25T11:49:40+02:002023-04-25T15:20:48+02:00application/octet-streamdata37302544https://gitlab.inptdat.de/dataset/formation-mechanisms-striations-filamentary-dielectric-barrier-discharge-atmospheric-4Formation mechanisms of striations in a filamentary DBD in atmospheric pressure Ar-Fig.8Spatial profiles of the number densities of all included particle species along the symmetry axis at four characteristic times during the transient glow phase. The table contains the axial position in the first column, and number densities of the particles for each time in the following columns.

column 1: 'z [m]'
column 2: '[Ar^*] [m^-3] at 51.1 microseconds'
column 3: '[Ar^+] [m^-3] at 51.1 microseconds'
column 4: '[Ar_2^*] [m^-3] at 51.1 microseconds'
column 5: '[Ar_2^+] [m^-3] at 51.1 microseconds'
column 6: '[e] [m^-3] at 51.1 microseconds'
column 7: '[Ar^*] [m^-3] at 51.6microseconds'
column 8: '[Ar^+] [m^-3] at 51.6 microseconds'
column 9: '[Ar_2^*] [m^-3] at 51.6 microseconds'
column 10: '[Ar_2^+] [m^-3] at 51.6 microseconds'
column 11: '[e] [m^-3] at 51.6 microseconds'
column 12: '[Ar^*] [m^-3] at 51.8 microseconds'
column 13: '[Ar^+] [m^-3] at 51.8 microseconds'
column 14: '[Ar_2^*] [m^-3] at 51.8 microseconds'
column 15: '[Ar_2^+] [m^-3] at 51.8 microseconds'
column 16: '[e] [m^-3] at 51.8 microseconds'
column 17: '[Ar^*] [m^-3] at 52.0 microseconds'
column 18: '[Ar^+] [m^-3] at 52.0 microseconds'
column 19: '[Ar_2^*] [m^-3] at 52.0 microseconds'
column 20: '[Ar_2^+] [m^-3] at 52.0 microseconds'
column 21: '[e] [m^-3] at 52.0 microseconds'

]]>2023-04-25T12:07:03+02:002023-04-25T15:20:48+02:00text/csvcsv263756https://gitlab.inptdat.de/dataset/formation-mechanisms-striations-filamentary-dielectric-barrier-discharge-atmospheric-5Formation mechanisms of striations in a filamentary DBD in atmospheric pressure Ar-Fig.9Spatial profiles of the reduced electric field, mean electron energy and space charge density along the symmetry axis at four characteristic times during the transient glow phase. The table contains the axial position in the first column, and the reduced electric field, mean electron energy and space charge density for each time in the following columns.

column 1: 'z [m]'
column 2: 'reduced electric field [Td] at 51.1 microseconds'
column 3: 'mean electron energy [eV] at 51.1 microseconds'
column 4: 'space charge density [C m^-3] at 51.1 microseconds'
column 5: 'reduced electric field [Td] at 51.6 microseconds'
column 6: 'mean electron energy [eV] at 51.6 microseconds'
column 7: 'space charge density [C m^-3] at 51.6 microseconds'
column 8: 'reduced electric field [Td] at 51.8 microseconds'
column 9: 'mean electron energy [eV] at 51.8 microseconds'
column 10: 'space charge density [C m^-3] at 51.8 microseconds'
column 11: 'reduced electric field [Td] at 52.0 microseconds'
column 12: 'mean electron energy [eV] at 52.0 microseconds'
column 13: 'space charge density [C m^-3] at 52.0 microseconds'

]]>2023-04-25T12:14:43+02:002023-04-25T15:20:48+02:00text/csvcsv163538https://gitlab.inptdat.de/dataset/formation-mechanisms-striations-filamentary-dielectric-barrier-discharge-atmospheric-6Formation mechanisms of striations in a filamentary DBD in atmospheric pressure Ar-Fig.10Spatial profiles of the rates of electron production, and divergence of the electric flux along the symmetry axis at four characteristic times during the transient glow phase. The table contains the axial position in the first column, and rates and the divergence of the flux for each time in the following columns.

column 1: 'z [m]'
column 2: 'direct ionsiation [m^-3 s^-1] at 51.1 microseconds'
column 3: 'stepwise ionisation [m^-3 s^-1] at 51.1 microseconds'
column 4: 'excimer ionsiation [m^-3 s^-1] at 51.1 microseconds'
column 5: 'chemo-ionisation [m^-3 s^-1] at 51.1 microseconds'
column 6: 'dissociative recombination [m^-3 s^-1] at 51.1 microseconds'
column 7: 'divergence of electron flux [m^-3 s^-1] at 51.1 microseconds'
column 8: 'direct ionsiation [m^-3 s^-1] at 51.6 microseconds'
column 9: 'stepwise ionisation [m^-3 s^-1] at 51.6 microseconds'
column 10: 'excimer ionsiation [m^-3 s^-1] at 51.6 microseconds'
column 11: 'chemo-ionisation [m^-3 s^-1] at 51.6 microseconds'
column 12: 'dissociative recombination [m^-3 s^-1] at 51.6 microseconds'
column 13: 'divergence of electron flux [m^-3 s^-1] at 51.6 microseconds'
column 14: 'direct ionsiation [m^-3 s^-1] at 51.8 microseconds'
column 15: 'stepwise ionisation [m^-3 s^-1] at 51.8 microseconds'
column 16: 'excimer ionsiation [m^-3 s^-1] at 51.8 microseconds'
column 17: 'chemo-ionisation [m^-3 s^-1] at 51.8 microseconds'
column 18: 'dissociative recombination [m^-3 s^-1] at 51.8 microseconds'
column 19: 'divergence of electron flux [m^-3 s^-1] at 51.8 microseconds'
column 20: 'direct ionsiation [m^-3 s^-1] at 52.0 microseconds'
column 21: 'stepwise ionisation [m^-3 s^-1] at 52.0 microseconds'
column 22: 'excimer ionsiation [m^-3 s^-1] at 52.0 microseconds'
column 23: 'chemo-ionisation [m^-3 s^-1] at 52.0 microseconds'
column 24: 'dissociative recombination [m^-3 s^-1] at 52.0 microseconds'
column 25: 'divergence of electron flux [m^-3 s^-1] at 52.0 microseconds'

]]>2023-04-25T12:27:44+02:002023-04-25T15:20:48+02:00text/csvcsv316618https://gitlab.inptdat.de/dataset/formation-mechanisms-striations-filamentary-dielectric-barrier-discharge-atmospheric-7Formation mechanisms of striations in a filamentary DBD in atmospheric pressure Ar-Fig.11Abel-transformed distribution of the electron density at the time of the most intense striations. Due to file size, the data are saved in binary hdf5 file. The file can be opened using any program that supports opening hdf5 files, such as HDF Viewer, Origin Pro, Matlab, or various libraries in python. The data are stored as a three-column form table in which the radial position in the first column is varied for each axial position in the second column and the following column contains the Abel-transformed electron density for corresponding positions. Note that NaN data occur for the spatial points outside the computational domain.

Dataset: 'Figure11'
Size: 60802
Structured array:
column 1: 'r [m]': H5T_IEEE_F64LE (double)
column 2: 'z [m]': H5T_IEEE_F64LE (double)
column 3: 'Abel transformed [e] [m^-3] at 52.0 microseconds': H5T_IEEE_F64LE (double)

]]>2023-04-25T12:35:06+02:002023-04-25T15:20:48+02:00application/octet-streamdata1461296https://gitlab.inptdat.de/dataset/formation-mechanisms-striations-filamentary-dielectric-barrier-discharge-atmospheric-8Formation mechanisms of striations in a filamentary DBD in atmospheric pressure Ar-Fig.13The spatial profiles of the electron number density for three characteristic times during the discharge in the negative half-period. The data are saved in binary hdf5 file due to their size. The file can be opened using any program that supports opening hdf5 files, such as HDF Viewer, Origin Pro, Matlab, or various libraries in python. The data are stored as a three-column form table in which the radial position in the first column is varied for each axial position in the second column and the following columns contain the number density of electrons for corresponding positions at the given times. Note that NaN data occur for the spatial points outside the computational domain.

Dataset: 'Figure13_a-c'
Size: 777051
Structured array:
column 1: 'r [m]': H5T_IEEE_F64LE (double)
column 2: 'z [m]': H5T_IEEE_F64LE (double)
column 3: '[e] [m^-3] at 56.700 microseconds': H5T_IEEE_F64LE (double)
column 4: '[e] [m^-3] at 56.781 microseconds': H5T_IEEE_F64LE (double)
column 5: '[e] [m^-3] at 57.000 microseconds': H5T_IEEE_F64LE (double)

]]>2023-04-25T13:32:00+02:002023-04-25T15:20:48+02:00application/octet-streamdata31086136https://gitlab.inptdat.de/dataset/formation-mechanisms-striations-filamentary-dielectric-barrier-discharge-atmospheric-9Formation mechanisms of striations in a filamentary DBD in atmospheric pressure Ar-Fig.14Spatial profiles of the number densities of all included particle species, and mean electron energy along the symmetry axis at three characteristic times during the discharge in the negative half-period. The table contains the axial position in the first column, and number densities of the particles and the mean electron energy for each time in the following columns.

column 1: 'z [m]'
column 2: '[Ar^*] [m^-3] at 56.700 microseconds'
column 3: '[Ar^+] [m^-3] at 56.700 microseconds'
column 4: '[Ar_2^*] [m^-3] at 56.700 microseconds'
column 5: '[Ar_2^+] [m^-3] at 56.700 microseconds'
column 6: '[e] [m^-3] at 56.700 microseconds'
column 7: 'u_e [eV] at 56.700 microseconds'
column 8: '[Ar^*] [m^-3] at 56.781 microseconds'
column 9: '[Ar^+] [m^-3] at 56.781 microseconds'
column 10: '[Ar_2^*] [m^-3] at 56.781 microseconds'
column 11: '[Ar_2^+] [m^-3] at 56.781 microseconds'
column 12: '[e] [m^-3] at 56.781 microseconds'
column 13: 'u_e [eV] at 56.781 microseconds'
column 14: '[Ar^*] [m^-3] at 57.000 microseconds'
column 15: '[Ar^+] [m^-3] at 57.000 microseconds'
column 16: '[Ar_2^*] [m^-3] at 57.000 microseconds'
column 17: '[Ar_2^+] [m^-3] at 57.000 microseconds'
column 18: '[e] [m^-3] at 57.000 microseconds'
column 19: 'u_e [eV] at 57.000 microseconds'

]]>2023-04-25T13:52:04+02:002023-04-25T15:20:48+02:00text/csvcsv238654https://gitlab.inptdat.de/dataset/formation-mechanisms-striations-filamentary-dielectric-barrier-discharge-atmospheric-10Formation mechanisms of striations in a filamentary DBD in atmospheric pressure Ar-Fig.15Spatial profiles of the rates of electron production, and reduced electric field along the symmetry axis at three characteristic times during the discharge in the negative half-period. The table contains the axial position in the first column, and rates and the reduced electric field for each time in the following columns.

column 1: 'z [m]'
column 2: 'direct ionsiation [m^-3 s^-1] at 56.700 microseconds'
column 3: 'stepwise ionisation [m^-3 s^-1] at 56.700 microseconds'
column 4: 'excimer ionsiation [m^-3 s^-1] at 56.700 microseconds'
column 5: 'chemo-ionisation [m^-3 s^-1] at 56.700 microseconds'
column 6: 'dissociative recombination [m^-3 s^-1] at 56.700 microseconds'
column 7: 'reduced electric field [Td] at 56.700 microseconds'
column 8: 'direct ionsiation [m^-3 s^-1] at 56.781 microseconds'
column 9: 'stepwise ionisation [m^-3 s^-1] at 56.781 microseconds'
column 10: 'excimer ionsiation [m^-3 s^-1] at 56.781 microseconds'
column 11: 'chemo-ionisation [m^-3 s^-1] at 56.781 microseconds'
column 12: 'dissociative recombination [m^-3 s^-1] at 56.781 microseconds'
column 13: 'reduced electric field [Td] at 56.781 microseconds'
column 14: 'direct ionsiation [m^-3 s^-1] at 57.000 microseconds'
column 15: 'stepwise ionisation [m^-3 s^-1] at 57.000 microseconds'
column 16: 'excimer ionsiation [m^-3 s^-1] at 57.000 microseconds'
column 17: 'chemo-ionisation [m^-3 s^-1] at 57.000 microseconds'
column 18: 'dissociative recombination [m^-3 s^-1] at 57.000 microseconds'
column 19: 'reduced electric field [Td] at 57.000 microseconds'

]]>2023-04-25T14:05:30+02:002023-04-25T15:20:48+02:00text/csvcsv240486https://gitlab.inptdat.de/dataset/formation-mechanisms-striations-filamentary-dielectric-barrier-discharge-atmospheric-11DKANhttps://gitlab.inptdat.de