Penetration of a Pulsed Guided Streamer Discharge into Micrometer-Sized Capillary Tubes
The penetration and propagation of streamers in capillary tubes is critical for applications involving the plasma-enabled disinfection of medical devices like catheters and plasma catalysis. In this study, a guided streamer is generated in a pulsed plasma jet operating in helium and impinged downstr...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-11-01
|
| Series: | Plasma |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2571-6182/6/4/46 |
| _version_ | 1797379662826962944 |
|---|---|
| author | Samyak Jain Peter J. Bruggeman |
| author_facet | Samyak Jain Peter J. Bruggeman |
| author_sort | Samyak Jain |
| collection | DOAJ |
| description | The penetration and propagation of streamers in capillary tubes is critical for applications involving the plasma-enabled disinfection of medical devices like catheters and plasma catalysis. In this study, a guided streamer is generated in a pulsed plasma jet operating in helium and impinged downstream onto a capillary tube with an inner diameter between 75 and 500 µm. The threshold voltage required to start the penetration of the guided streamer into the capillary was determined for both positive and negative polarities, and we observed a time delay between the streamer striking the top of the capillary and its penetration, which was found to be larger for the positive than the negative streamer. The observed differences can be explained by the need to sustain an electric field large enough to generate a sufficient seed electron density in the capillary to launch the streamer. The reported results suggest that the electric field at the capillary inlet is likely reduced by the formation of strong surface ionization waves for positive streamers. Nonetheless, in the case of positive streamers, the formation of surface streamers along the outside of the capillary wall can enhance streamer penetration into the capillary and the streamer propagation speed. |
| first_indexed | 2024-03-08T20:26:17Z |
| format | Article |
| id | doaj.art-a93c8902b47f48f1940480b92bcad229 |
| institution | Directory Open Access Journal |
| issn | 2571-6182 |
| language | English |
| last_indexed | 2024-03-08T20:26:17Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plasma |
| spelling | doaj.art-a93c8902b47f48f1940480b92bcad2292023-12-22T14:35:23ZengMDPI AGPlasma2571-61822023-11-016466367910.3390/plasma6040046Penetration of a Pulsed Guided Streamer Discharge into Micrometer-Sized Capillary TubesSamyak Jain0Peter J. Bruggeman1Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455, USADepartment of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455, USAThe penetration and propagation of streamers in capillary tubes is critical for applications involving the plasma-enabled disinfection of medical devices like catheters and plasma catalysis. In this study, a guided streamer is generated in a pulsed plasma jet operating in helium and impinged downstream onto a capillary tube with an inner diameter between 75 and 500 µm. The threshold voltage required to start the penetration of the guided streamer into the capillary was determined for both positive and negative polarities, and we observed a time delay between the streamer striking the top of the capillary and its penetration, which was found to be larger for the positive than the negative streamer. The observed differences can be explained by the need to sustain an electric field large enough to generate a sufficient seed electron density in the capillary to launch the streamer. The reported results suggest that the electric field at the capillary inlet is likely reduced by the formation of strong surface ionization waves for positive streamers. Nonetheless, in the case of positive streamers, the formation of surface streamers along the outside of the capillary wall can enhance streamer penetration into the capillary and the streamer propagation speed.https://www.mdpi.com/2571-6182/6/4/46guided streamerplasma jetplasma penetrationhigh aspect ratio capillariesstreamer propagation |
| spellingShingle | Samyak Jain Peter J. Bruggeman Penetration of a Pulsed Guided Streamer Discharge into Micrometer-Sized Capillary Tubes Plasma guided streamer plasma jet plasma penetration high aspect ratio capillaries streamer propagation |
| title | Penetration of a Pulsed Guided Streamer Discharge into Micrometer-Sized Capillary Tubes |
| title_full | Penetration of a Pulsed Guided Streamer Discharge into Micrometer-Sized Capillary Tubes |
| title_fullStr | Penetration of a Pulsed Guided Streamer Discharge into Micrometer-Sized Capillary Tubes |
| title_full_unstemmed | Penetration of a Pulsed Guided Streamer Discharge into Micrometer-Sized Capillary Tubes |
| title_short | Penetration of a Pulsed Guided Streamer Discharge into Micrometer-Sized Capillary Tubes |
| title_sort | penetration of a pulsed guided streamer discharge into micrometer sized capillary tubes |
| topic | guided streamer plasma jet plasma penetration high aspect ratio capillaries streamer propagation |
| url | https://www.mdpi.com/2571-6182/6/4/46 |
| work_keys_str_mv | AT samyakjain penetrationofapulsedguidedstreamerdischargeintomicrometersizedcapillarytubes AT peterjbruggeman penetrationofapulsedguidedstreamerdischargeintomicrometersizedcapillarytubes |