Here, a microplasma channel was investigated. The setup consists of three stacked layers: a magnet, a dielectric foil and two nickel foils that are separated by a 120 μm wide gap. The magnet is grounded while the two nickel foils are powered. The setup was operated with a triangular voltage with a frequency of 10 kHz and an amplitude of up to 700 V in Helium at atmospheric pressure. Phase resolved emission images were used to investigate the microplasma channel dynamics with line of sight from the top and from the side to the inside of the cavity. The top view images revealed that the discharge in the microplasma channel and the microplasma arrays behave similar. The already known asymmetric discharge behavior, the self-pulsing and the wavelike ignition was also observed in the microplasma channel. For the wavelike ignition in the channel a simple one dimensional model was proposed. With the additional side view images the asymmetric discharge behavior was examined more thoroughly. Unlike in the microplasma arrays, the discharge expands here in both half periods of the applied voltage above the upper edge of the powered electrodes. The discharge extends over a larger width in the half period, in which the potential of the upper electrodes is increasing, while it extends over a larger height in the other half period. Phase resolved images were also used to investigate the ignition phase of the discharge. The discharge ignites in the two half periods on a different height. This was explained by modeling the drift and diffusion of the charged particles between two discharge pulses.
Field | Value |
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Publisher | |
Authors | |
Release Date | 2021-02-02 |
Resources | |
Identifier | e1b8ea5b-129b-4593-8956-2224c4ff1466 |
Permanent Identifier (URI) | |
Is supplementing | |
Plasma Source Name | |
Plasma Source Application | |
Plasma Source Specification | |
Plasma Source Properties | up to 1,4 kVpp, 10 kHz, triangular voltage
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Plasma Source Procedure | Before each measurement the setup was heated to 50°C for 20 min and a cold trap (dry ice) was used to reduce impurities. |
Plasma Medium Name | |
Plasma Medium Properties | 0,5 slm Helium 5.0 |
Plasma Medium Procedure | Before each measurement the setup was heated to 50°C for 20 min and a cold trap (dry ice) was used to reduce impurities. |
Plasma Diagnostic Properties | Andor iStar DH334T-18U-73 and Andor iStar DH334T-18UE3 |
Plasma Diagnostic Name | |
Language | English (United States) |
License | |
Public Access Level | Public |
Funding Agency | |
Project | |
Subproject | |
Contact Name | Simon Kreuznacht |
Contact Email |
Data and Resources
- Phase resolved top viewzip
Phase resolved top view images of the full channel. The ICCD camera was...
Download - Phase resolved top view short sectionzip
Phase resolved top view images of the a 2,2 mm long section of the channel....
Download - Phase resolved side viewzip
Phase resolved side view images. The ICCD camera was triggered on the...
Download - Phase resolved integrated intensity as a function of the applied voltagezip
Phase resolved integrated intensity. The intensity was measured by...
Download - Modelled ion and electron density between to discharge pulseszip
ExampleFile.txt only shows the structure of the other four files. There are...
Download - Appendix: Phase resolved side view Azip
Phase resolved side view images. The ICCD camera was triggered on the...
Download - Appendix: Phase resolved top viewzip
Phase resolved top view images of the full channel. The ICCD camera was...
Download - Appendix: Phase resolved side view Bzip
Phase resolved side view images. The ICCD camera was triggered on the...
Download