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Effects of the electrical excitation signal parameters on the geometry of an argon-based non-thermal atmospheric pressure plasma jet.

Benabbas MT, Sahli S, Benhamouda A, Rebiai S - Nanoscale Res Lett (2014)

Bottom Line: The length and the shape of the created plasma jet were found to be strongly dependent on the electrode setup and the applied voltage and the signal frequency values.The length of the plasma jet increases when the applied voltage and/or its frequency increase, while the diameter at its end is significantly reduced when the applied signal frequency increases.This obtained size of the plasma jet diameter is very useful when the medical treatment must be processed in a reduced space.

View Article: PubMed Central - PubMed

Affiliation: Microsystems and Instrumentation Laboratory, Department of Electronics, Faculty of Sciences of Technology, University of Constantine 1, 25017, Constantine, Algeria, m.t.benabbas@gmail.com.

ABSTRACT
A non-thermal atmospheric pressure argon plasma jet for medical applications has been generated using a high-voltage pulse generator and a homemade dielectric barrier discharge (DBD) reactor with a cylindrical configuration. A plasma jet of about 6 cm of length has been created in argon gas at atmospheric pressure with an applied peak to peak voltage and a frequency of 10 kV and 50 kHz, respectively. The length and the shape of the created plasma jet were found to be strongly dependent on the electrode setup and the applied voltage and the signal frequency values. The length of the plasma jet increases when the applied voltage and/or its frequency increase, while the diameter at its end is significantly reduced when the applied signal frequency increases. For an applied voltage of 10 kV, the plasma jet diameter decreases from near 5 mm for a frequency of 10 kHz to less than 1 mm at a frequency of 50 kHz. This obtained size of the plasma jet diameter is very useful when the medical treatment must be processed in a reduced space. PACS 2008: 52.50.Dg; 52.70.-m; 52.80.-s.

No MeSH data available.


Schematic representation of the plasma jet reactor.
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Fig1: Schematic representation of the plasma jet reactor.

Mentions: The schematic representation of our homemade non-thermal atmospheric pressure plasma jet reactor is represented in Figure 1. It is constituted by a quartz tube (quartz thickness = 1 mm) as a dielectric barrier, a stainless steel tube of 6 mm of external diameter and 1 mm of thickness inserted into the glass tube as an inner electrode, and a coiled tungsten wire of 0.5 mm of diameter placed around the neck of the glass tube as an outer electrode. In order to obtain a homogeneous DBD discharge, the stainless steel tube with a previously polished external surface was fixed at the center of the glass tube using PTFE spacers. The argon gas (99.99%) with a flow rate of about 8 l/min was injected through the inner electrode to the discharge area situated between the two electrodes. The volume of the discharge area was reduced by fixing the inner electrode very close to the outer one (the two electrodes were separated by a few millimeters), leading to less electrical power consumption (7 to 10 W) and to less energy dissipation, avoiding then the use of a cooling system. This reactor geometry prevents glow to arc transition due to charge propagation. The inner and the outer electrodes are connected to a Redline G2000 high-voltage pulse generator (Redline Technologies Elektronik GmbH, Baesweiler, Germany), able to deliver up to 20 kV peak to peak in a frequency range of 4 to 500 kHz. A Canon PowerShot SX220 HS camera (Canon Inc., Tokyo, Japan) was used to take photos of the created plasmas.Figure 1


Effects of the electrical excitation signal parameters on the geometry of an argon-based non-thermal atmospheric pressure plasma jet.

Benabbas MT, Sahli S, Benhamouda A, Rebiai S - Nanoscale Res Lett (2014)

Schematic representation of the plasma jet reactor.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4494020&req=5

Fig1: Schematic representation of the plasma jet reactor.
Mentions: The schematic representation of our homemade non-thermal atmospheric pressure plasma jet reactor is represented in Figure 1. It is constituted by a quartz tube (quartz thickness = 1 mm) as a dielectric barrier, a stainless steel tube of 6 mm of external diameter and 1 mm of thickness inserted into the glass tube as an inner electrode, and a coiled tungsten wire of 0.5 mm of diameter placed around the neck of the glass tube as an outer electrode. In order to obtain a homogeneous DBD discharge, the stainless steel tube with a previously polished external surface was fixed at the center of the glass tube using PTFE spacers. The argon gas (99.99%) with a flow rate of about 8 l/min was injected through the inner electrode to the discharge area situated between the two electrodes. The volume of the discharge area was reduced by fixing the inner electrode very close to the outer one (the two electrodes were separated by a few millimeters), leading to less electrical power consumption (7 to 10 W) and to less energy dissipation, avoiding then the use of a cooling system. This reactor geometry prevents glow to arc transition due to charge propagation. The inner and the outer electrodes are connected to a Redline G2000 high-voltage pulse generator (Redline Technologies Elektronik GmbH, Baesweiler, Germany), able to deliver up to 20 kV peak to peak in a frequency range of 4 to 500 kHz. A Canon PowerShot SX220 HS camera (Canon Inc., Tokyo, Japan) was used to take photos of the created plasmas.Figure 1

Bottom Line: The length and the shape of the created plasma jet were found to be strongly dependent on the electrode setup and the applied voltage and the signal frequency values.The length of the plasma jet increases when the applied voltage and/or its frequency increase, while the diameter at its end is significantly reduced when the applied signal frequency increases.This obtained size of the plasma jet diameter is very useful when the medical treatment must be processed in a reduced space.

View Article: PubMed Central - PubMed

Affiliation: Microsystems and Instrumentation Laboratory, Department of Electronics, Faculty of Sciences of Technology, University of Constantine 1, 25017, Constantine, Algeria, m.t.benabbas@gmail.com.

ABSTRACT
A non-thermal atmospheric pressure argon plasma jet for medical applications has been generated using a high-voltage pulse generator and a homemade dielectric barrier discharge (DBD) reactor with a cylindrical configuration. A plasma jet of about 6 cm of length has been created in argon gas at atmospheric pressure with an applied peak to peak voltage and a frequency of 10 kV and 50 kHz, respectively. The length and the shape of the created plasma jet were found to be strongly dependent on the electrode setup and the applied voltage and the signal frequency values. The length of the plasma jet increases when the applied voltage and/or its frequency increase, while the diameter at its end is significantly reduced when the applied signal frequency increases. For an applied voltage of 10 kV, the plasma jet diameter decreases from near 5 mm for a frequency of 10 kHz to less than 1 mm at a frequency of 50 kHz. This obtained size of the plasma jet diameter is very useful when the medical treatment must be processed in a reduced space. PACS 2008: 52.50.Dg; 52.70.-m; 52.80.-s.

No MeSH data available.