Low Cost Compact Nanosecond Pulsed Plasma System for Environmental and Biomedical Applications

Malik, Muhammad Arif; Schoenbach, K.H.; Abdel‐Fattah, Tarek M.; Heller, Richard; Jiang, Chunqi

doi:10.1007/s11090-016-9747-9

Cited by 23 publications

(11 citation statements)

References 74 publications

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“…The presented value is only estimative and does not reflect the in situ measurement of hydrogen peroxide production. The most probable hydrogen peroxide production is water molecule splitting, OH radical reactions during the plasma activation, and the preservation by effective absorption into the water [ 1 , 2 , 32 ].…”

Section: Resultsmentioning

confidence: 99%

Multi-Hollow Surface Dielectric Barrier Discharge for Bacterial Biofilm Decontamination

et al. 2021

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The plasma-activated gas is capable of decontaminating surfaces of different materials in remote distances. The effect of plasma-activated water vapor on Staphylococcus epidermidis, methicillin-resistant Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli biofilm contamination was investigated on the polypropylene nonwoven textile surface. The robust and technically simple multi-hollow surface dielectric barrier discharge was used as a low-temperature atmospheric plasma source to activate the water-based medium. The germicidal efficiency of short and long-time exposure to plasma-activated water vapor was evaluated by standard microbiological cultivation and fluorescence analysis using a fluorescence multiwell plate reader. The test was repeated in different distances of the contaminated polypropylene nonwoven sample from the surface of the plasma source. The detection of reactive species in plasma-activated gas flow and condensed activated vapor, and thermal and electrical properties of the used plasma source, were measured. The bacterial biofilm decontamination efficiency increased with the exposure time and the plasma source power input. The log reduction of viable biofilm units decreased with the increasing distance from the dielectric surface.

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Section: Resultsmentioning

confidence: 99%

Multi-Hollow Surface Dielectric Barrier Discharge for Bacterial Biofilm Decontamination

et al. 2021

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“…Values of K were obtained in [16] and [31] for a quasiuniform electric field, and found to be ~24.7. However, as the electric field in the switch tested herein is highly divergent due to the presence of the needle electrodes, the coefficient  was used in (4) to account for such field non-uniformity. In [32], it was found that  is proportional to El/p, where E is the electrical field strength at breakdown.…”

Section: B the Kushner Model For Plasma Resistancementioning

confidence: 99%

“…PCSs are employed in different pulsed power systems and machines, such as linear transformer drivers Y. Yao (LTDs), [1], Marx generators for Z-pinches, [2], apparatuses for the generation of ultra-wide band electromagnetic impulses, [3], and generators of high voltage impulses for biomedical and environmental applications, [4]. Over the past several decades, a significant variety of different topologies of gas-filled PCSs has been developed, and their operational characteristics have been investigated and reported, [5].…”

Section: Introductionmentioning

confidence: 99%

Postbreakdown Transient Characteristics of a Gas-Filled Plasma Closing Switch

Yao

Timoshkin

MacGregor

et al. 2021

IEEE Trans. Plasma Sci.

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Gas-filled plasma closing switches (PCSs) are essential components of high energy density pulsed power systems, used to generate short, high-power (10s MW to several GW) impulses. In practical applications, PCSs are required to operate in high current (10s kA), high voltage (10s-100s kV) regimes, to produce fast-rising ns and sub-ns HV impulses. The transient impedance of a PCS affects the rise time of the generated impulses and the power delivered to the load. Thus, design and optimisation of PCSs require detailed information on the dynamic plasma resistance. The present paper is focused on an investigation of the timedependent resistance of the plasma channel(s) formed between the electrodes of a multi-electrode PCS. Experimentally-measured underdamped current and voltage waveforms were used to obtain the transient plasma resistance of the PCS. The PCS was filled with different gases: dry air, CO2, N2 and a 90%/10% Ar/O2 mixture, in the pressure range from 0 bar up to 10 bar (gauge). It was found that the plasma resistance drops rapidly from a few hundreds of Ohms to a few hundreds of milli-Ohms due to the Joule heating of the breakdown channel. The methods proposed by Braginskii and Kushner to model the transient post-breakdown resistance were used to obtain analytical plasma resistances for all of the gasses. These resistances have been compared with the transient resistance obtained using a Kirchhoff analysis of the lumped-element, post-breakdown RLC circuit. Based on this comparison, the suitability of the chosen analytical methods to determine the transient breakdown resistance in gases is discussed. The obtained results will help in optimisation of the operational performance of PCSs filled with environmentallyfriendly, low environmental impact gases.

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“…The short‐pulsed plasma facilitates the generation of desired products through enhanced ionization during discharge initiation and the associated high nonequilibrium electron energy distribution function. [ 15 ]…”

Section: Introductionmentioning

confidence: 99%

Enhanced aerosol deposition by a low‐cost compact nanosecond‐pulsed plasma system

Liu

2021

Plasma Processes & Polymers

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Nanosecond (ns)-pulsed air plasmas are promising for environmental and biomedical applications. This paper presented a low-cost ns-pulsed plasma system that consists of a two-stage Cockcroft-Walton voltage multiplier, a spark gap gas switch, and a plasma reactor. This ns power supply generated a uniform air plasma with a volume of 25 × 25 × 2 cm and a maximum ion wind of 0.8 m/s. The ion wind transported aerosols through plasma volume. Aerosols were charged

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Low Cost Compact Nanosecond Pulsed Plasma System for Environmental and Biomedical Applications

Cited by 23 publications

References 74 publications

Multi-Hollow Surface Dielectric Barrier Discharge for Bacterial Biofilm Decontamination

Multi-Hollow Surface Dielectric Barrier Discharge for Bacterial Biofilm Decontamination

Postbreakdown Transient Characteristics of a Gas-Filled Plasma Closing Switch

Enhanced aerosol deposition by a low‐cost compact nanosecond‐pulsed plasma system

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