Leibniz Institute for Plasma Science and Technology
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The Leibniz Institute for Plasma Science and Technology (INP) is the largest non-university institute in the field of low temperature plasmas, their basics and technical applications in Europe. The institute carries out research and development from idea to prototype. The topics focus on the needs of the market. At present, plasmas for materials and energy as well as for environment and health are the focus of interest.

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Impact of the electrode proximity on the streamer breakdown and development of pulsed dielectric barrier discharges - Dataset

Presented data was obtained from the analysis of the impact of the electrode proximity on the streamer breakdown and development of pulsed-driven dielectric barrier discharges (DBDs) in a singlefilament arrangement in a gas mixture of 0.1 vol% O2 in N2 at 0.6 bar and 1.0 bar. The gap distance was varied from 0.5 mm to 1.5 mm, and the applied voltage was adapted correspondingly to create comparable breakdown conditions in the gap. Fast electrical measurements provided insight into discharge characteristics such as the transferred charge and consumed energy. Results show that the proximity of the cathode has a strong impact on the characteristics of the streamer breakdown.

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Plasma Source Name
Plasma Source Application
Plasma Source Specification
Plasma Source Properties

A symmetric double-sided arrangement with hemi-spherical alumina (Al2O3) covered metal electrodes was used for investigating single-filament DBDs. The thickness of the dielectric barriers was (0.50±0.05) mm and the radius of curvature of their surface was (2.0±0.1) mm. The gap distance between the electrodes was set to 0.5 mm, 1.0 mm or 1.5 mm, respectively, with a maximum error of 3%. The electrodes were implemented in a gas cell made of glass with two lateral quartz glass windows that allowed the observation of the DBDs from the UV to the near-infrared. The cell had a gas inlet at the top and an outlet to a vacuum pumping system at the bottom.

Plasma Source Procedure
Before filling the cell with a specific gas mixture, it was evacuated to p<10^(−4) mbar by a turbopump system (Pfeiffer, TSH261), and subsequently an additional membrane pump (Pfeiffer, MVP 020-3 AC) was used as a process pump in a bypass to adjust the pressure in the cell to either 0.6 bar or 1.0 bar. The DBDs were driven by unipolar positive square wave pulses with a repetition rate of 10 kHz and a pulse width of 1 µs. The amplitude of the applied voltage pulses was therefore systematically varied between 4 and 14 kV. The shape of the voltage pulses was specified by the high voltage pulse generator (Behlke, HTS 161-06 GSM) that was supplied by a high-voltage power supply (FUG, HCN 1400-12500) and controlled by a digital delay generator (NI, DG645).
Plasma Medium Name
Plasma Medium Properties

A gas mixture of 0.1 vol% O2 in N2 at a pressure of p = 1 bar and p = 0.6 bar, respectively, was used for all experiments.

Plasma Medium Procedure

The gas flow through the cell was set to 100 sccm by mass flow controllers (MKS 179B with control unit MKS 647B) connected to gas cylinders (Air Liquide, gas purity 99.999%).

Plasma Diagnostics Name
Plasma Diagnostics Properties

Electrical measurements were performed with fast voltage (Tektronix, P6015A) and current probes (custom-build according to and recorded with a digital sampling oscilloscope (R&S, RTO 1044, 4GHz, 20GS/s).

The DBDs were observed simultaneously by an iCCD camera (Andor, iStar DH734-18U-A3, resolution: ∆t ≥ 2ns, ∆x ≥ 2µm) and a streak camera system (Hamamatsu, C5680-21C, resolution: ∆t ≥ 20ps, ∆x ≥ 2µm) connected to a long-distance microscope (Questar, QM100, UV transparent). Both cameras were sensitive in the UV and visible spectral range.

Plasma Diagnostics Procedure

All data were recorded spectrally-integrated.

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Contact Name
Wubs, Jente
Contact Email

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