Cathode fall parameters of a self-sustained normal glow discharge in atmospheric-pressure helium

Arkhipenko, V. I.; Zgirovskii, S. M.; Kirillov, A. A.; Simonchik, L. V.

doi:10.1134/1.1513839

Cited by 38 publications

(61 citation statements)

References 10 publications

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“…[1][2][3][4][5][6][7] These nonthermal atmospheric plasmas are typically generated between two parallel electrodes with voltage excitation at dc, [8][9][10][11] at the main frequency, 12 or at higher frequencies, from kilohertz to megahertz. [3][4][5][6][7] Their spatial appearance is characteristically diffuse and uniform, and their temporal features are repetitive and stable.…”

Section: Introductionmentioning

confidence: 99%

“…17 As the gas pressure is elevated to atmospheric pressure, the muchincreased collision between electrons and neutral particles significantly reduces the thickness of the cathode fall region to around 100 m. 9 Over this narrow width, secondary electrons released from the cathode are unlikely to gain sufficient acceleration and reach equilibrium with the local electric field. Therefore the hydrodynamic models typically used for nonthermal atmospheric plasmas are in principle inappropriate for the cathode fall region of the discharge even though such models have been successful in predicting the general trend of some discharge properties.…”

Section: Introductionmentioning

confidence: 99%

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Cathode fall characteristics in a dc atmospheric pressure glow discharge

Shi

Kong

2003

Journal of Applied Physics

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Atmospheric pressure glow discharges are attractive for a wide range of material-processing applications largely due to their operation flexibility afforded by removal of the vacuum system. These relatively new atmospheric plasmas are nonequilibrium plasmas with gas temperature around 100°C and electron temperature in the 1-10 eV range. Their appearance is characteristically diffuse and uniform, and their temporal features are repetitive and stable. Of the reported numerical studies of atmospheric glow discharges, most are based on the hydrodynamic approximation in which electrons are assumed to be in equilibrium with the local electric field. Spectroscopic and electrical measurements suggest however that the cathode fall region is fundamentally nonequilibrium. To this end we consider a hybrid model that treats the cathode fall region kinetically but retains a hydrodynamic description for the region between the thin cathode fall layer and the anode. Using this hybrid model, a helium discharge system excited at dc is studied numerically for a very wide current density range that spans from Townsend dark discharge, through normal glow discharge, to abnormal glow discharge. Numerical results confirm many distinct characteristics of glow discharges and compare well with that of low-pressure glow discharges. Generic relationships, such as that between the electric field and the current density, are also established and are in good agreement with experimental data. This hybrid model is simple and insightful as a theoretical tool for atmospheric pressure glow discharges.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cathode fall characteristics in a dc atmospheric pressure glow discharge

Shi

Kong

2003

Journal of Applied Physics

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“…This is also due to the bombardment of the cathode surface by ions launched from the plasma and accelerated in the strong electric field in the cathode fall and by fast neutral molecules created in collisions with ions in the cathode fall. The cathode temperature has a significant influence on the properties of the cathode fall [26][27][28][29][30][31] and on the cathode vaporization rate. In addition, the vaporization rate and the gas temperature determine the saturation state of the vapour in the gas which in turn determines the concentration and size of the primary particles.…”

Section: Discussionmentioning

confidence: 99%

Influence of the inter-electrode distance on the production of nanoparticles by means of atmospheric pressure inert gas dc glow discharge

Hontañón

Palomares

Guo

et al. 2014

J. Phys. D: Appl. Phys.

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Hontanõn, E.; Palomares Linares, J.M.; Guo, C.; Engeln, R.A.H.; Nirschi, H.; Kruis, F. Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers) Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication Citation for published version (APA):Hontanõn, E., Palomares Linares, J. M., Guo, C., Engeln, R. A. H., Nirschi, H., & Kruis, F. (2014). Influence of the interelectrode distance on the production of nanoparticles by means of atmospheric pressure inert gas DC glow discharge. Journal of Physics D: Applied Physics, 47, 415201-1/12. DOI: 10.1088/0022-3727/47/41/415201 General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. AbstractThis work is aimed at investigating the influence of the inter-electrode spacing on the production rate and size of nanoparticles generated by evaporating a cathode on an atmospheric pressure dc glow discharge. Experiments are conducted in the configuration of two vertically aligned cylindrical electrodes in upward coaxial flow with copper as a consumable cathode and nitrogen as a carrier gas. A constant current of 0.5 A is delivered to the electrodes and the inter-electrode distance spanned from 0.5 to 10 mm. Continuous stable nanoparticle production is attained by optimal coaxial flow convection cooling of the cathode. Both the particle production rate and the primary particle size increase with the inter-electrode spacing up to nearly 5 mm and strongly decrease with an increasing inter-electrode distance beyond 5 mm. Production rates in the range of 1 mg h −1 of very small nanoparticles (<10 nm) are attained by a micro glow discharge (<1 mm); while glow discharges of intermediate sizes (<5 mm) result in production rates ...

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“…En algunos trabajos se encuentra el estudio de los parámetros de la descarga luminiscente, entre los que se encuentran el campo eléctrico, el ancho de la zona de la caída catódica o región catódica, la temperatura del gas, la densidad de corriente y el flujo de calor hacia el cátodo [8,9,10].…”

Section: Introductionunclassified

“…La temperatura del gas y la temperatura de la superficie del cátodo son dos parámetros cuyo modelo teórico y datos experimentales no son consistentes [8,11], por lo cual se hace necesario realizar trabajos para contribuir a la comprensión de estos fenómenos y proponer aplicaciones basadas en estas caracterís-ticas.…”

Section: Introductionunclassified

Aplicación de la descarga luminiscente anormal como una fuente calórica

Supelano¹,

Santos²,

Soto³

2017

Cienc. En Desarro.

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ResumenLa tecnología del plasma es una ciencia que desde sus comienzos se encuentra en una constante evolución, desde aplicaciones para el tratamiento de materiales hasta aplicaciones ambientales. En particular el plasma de la descarga luminiscente ofrece una amplia gama de aplicaciones desde aplicaciones en plasmo-química hasta tratamientos termoquímicos de materiales. En el presente trabajo se busca aprovechar la generación de calor por parte de la descarga luminiscente de baja presión en corriente continua, debido a la transferencia de energía cinética desde el plasma hacia los electrodos. Para ello se diseñó un reactor cilíndrico que genera una descarga luminiscente de baja presión en una atmósfera de argón. El cátodo de la descarga lo constituye el electrodo interno, mientras que el ánodo, y al mismo tiempo la pared de la cámara, lo constituye un cilindro metálico externo, concéntrico al cátodo. Para mantener la descarga se utilizó una fuente de corriente continua pulsada y la descarga se generó a varias corrientes y en diferentes atmósferas gaseosas (N 2 , H 2 y Ar). Mediante medidas eléctricas de la descarga se determinó la potencia y consumo energético del reactor, comparándolo con los valores obtenidos para un dispositivo calefactor comercial basado en resistencias eléctricas.Palabras clave: Descarga luminiscente, temperatura del cátodo, transferencia de calor. AbstractPlasma technology is a science that is in a constant evolution from its beginnings, from applications from materials treatment until environmental applications. Particularly the glow discharge plasma offers a wide variety of uses, including plasma-chemical applications and thermo-chemical materials treatment. In the present work seeks to exploit the heat generation by the low pressure glow discharge, which is due to kinetic energy transfer from the plasma toward the electrodes. For this purpose a cylindrical reactor that generates a low-pressure glow discharge in gas argon was designed. The discharge cathode constitutes the internal electrode, while the anode, which also constitutes the chamber wall, is a metallic cylinder concentric to

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Cathode fall parameters of a self-sustained normal glow discharge in atmospheric-pressure helium

Cited by 38 publications

References 10 publications

Cathode fall characteristics in a dc atmospheric pressure glow discharge

Cathode fall characteristics in a dc atmospheric pressure glow discharge

Influence of the inter-electrode distance on the production of nanoparticles by means of atmospheric pressure inert gas dc glow discharge

Aplicación de la descarga luminiscente anormal como una fuente calórica

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