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Title: Transition from Townsend to radio-frequency homogeneous dielectric barrier discharge in a roll-to-roll configuration

Abstract

The aim of this paper is to better understand the transition from Townsend to radio-frequency homogeneous dielectric barrier discharge (DBD) at atmospheric pressure. The study is done in an Ar/NH{sub 3} Penning mixture for an electrode configuration adapted to roll-to-roll plasma surface treatment. The study was led in a frequency range running from 50 kHz up to 8.3 MHz leading to different DBD modes with a 1 mm gas gap: Glow (GDBD), Townsend (TDBD), and Radio-frequency (RF-DBD). In the frequency range between TDBD and RF-DBD, from 250 kHz to 2.3 MHz, additional discharges are observed outside the inter-electrode gas gap. Because each high voltage electrode are inside a dielectric barrel, these additional discharges occur on the side of the barrel where the gap is larger. They disappear when the RF-DBD mode is attained in the 1 mm inter-electrode gas gap, i.e., for frequencies equal or higher than 3 MHz. Fast imaging and optical emission spectroscopy show that the additional discharges are radio-frequency DBDs while the inter-electrode discharge is a TDBD. The RF-DBD discharge mode is attained when electrons drift becomes low enough compared to the voltage oscillation frequency to limit electron loss at the anode. To check that the additional discharges are due to amore » larger gas gap and a lower voltage amplitude, the TDBD/RF-DBD transition is investigated as a function of the gas gap and the applied voltage frequency and amplitude. Results show that the increase in the frequency at constant gas gap or in the gas gap at constant frequency allows to obtain RF-DBD instead of TDBD. At low frequency and large gap, the increase in the applied voltage allows RF-DBD/TDBD transition. As a consequence, an electrode configuration allowing different gap values is a solution to successively have different discharge modes with the same applied voltage.« less

Authors:
 [1];  [2];  [3];  [1]
  1. CNRS-PROMES, Rambla de la Thermodynamique, 66100 Perpignan (France)
  2. (France)
  3. SIAME, Université de Pau et des Pays de l'Adour, Pau (France)
Publication Date:
OSTI Identifier:
22596662
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 119; Journal Issue: 24; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AMMONIA; AMPLITUDES; ANODES; ATMOSPHERIC PRESSURE; COMPARATIVE EVALUATIONS; CONFIGURATION; DIELECTRIC MATERIALS; DIFFUSION BARRIERS; ELECTRIC POTENTIAL; ELECTRON DRIFT; ELECTRON LOSS; EMISSION SPECTROSCOPY; KHZ RANGE; MHZ RANGE 01-100; RADIOWAVE RADIATION; SURFACE TREATMENTS

Citation Formats

Bazinette, R., SIAME, Université de Pau et des Pays de l'Adour, Pau, Paillol, J., and Massines, F., E-mail: francoise.massines@promes.cnrs.fr. Transition from Townsend to radio-frequency homogeneous dielectric barrier discharge in a roll-to-roll configuration. United States: N. p., 2016. Web. doi:10.1063/1.4953389.
Bazinette, R., SIAME, Université de Pau et des Pays de l'Adour, Pau, Paillol, J., & Massines, F., E-mail: francoise.massines@promes.cnrs.fr. Transition from Townsend to radio-frequency homogeneous dielectric barrier discharge in a roll-to-roll configuration. United States. doi:10.1063/1.4953389.
Bazinette, R., SIAME, Université de Pau et des Pays de l'Adour, Pau, Paillol, J., and Massines, F., E-mail: francoise.massines@promes.cnrs.fr. Tue . "Transition from Townsend to radio-frequency homogeneous dielectric barrier discharge in a roll-to-roll configuration". United States. doi:10.1063/1.4953389.
@article{osti_22596662,
title = {Transition from Townsend to radio-frequency homogeneous dielectric barrier discharge in a roll-to-roll configuration},
author = {Bazinette, R. and SIAME, Université de Pau et des Pays de l'Adour, Pau and Paillol, J. and Massines, F., E-mail: francoise.massines@promes.cnrs.fr},
abstractNote = {The aim of this paper is to better understand the transition from Townsend to radio-frequency homogeneous dielectric barrier discharge (DBD) at atmospheric pressure. The study is done in an Ar/NH{sub 3} Penning mixture for an electrode configuration adapted to roll-to-roll plasma surface treatment. The study was led in a frequency range running from 50 kHz up to 8.3 MHz leading to different DBD modes with a 1 mm gas gap: Glow (GDBD), Townsend (TDBD), and Radio-frequency (RF-DBD). In the frequency range between TDBD and RF-DBD, from 250 kHz to 2.3 MHz, additional discharges are observed outside the inter-electrode gas gap. Because each high voltage electrode are inside a dielectric barrel, these additional discharges occur on the side of the barrel where the gap is larger. They disappear when the RF-DBD mode is attained in the 1 mm inter-electrode gas gap, i.e., for frequencies equal or higher than 3 MHz. Fast imaging and optical emission spectroscopy show that the additional discharges are radio-frequency DBDs while the inter-electrode discharge is a TDBD. The RF-DBD discharge mode is attained when electrons drift becomes low enough compared to the voltage oscillation frequency to limit electron loss at the anode. To check that the additional discharges are due to a larger gas gap and a lower voltage amplitude, the TDBD/RF-DBD transition is investigated as a function of the gas gap and the applied voltage frequency and amplitude. Results show that the increase in the frequency at constant gas gap or in the gas gap at constant frequency allows to obtain RF-DBD instead of TDBD. At low frequency and large gap, the increase in the applied voltage allows RF-DBD/TDBD transition. As a consequence, an electrode configuration allowing different gap values is a solution to successively have different discharge modes with the same applied voltage.},
doi = {10.1063/1.4953389},
journal = {Journal of Applied Physics},
number = 24,
volume = 119,
place = {United States},
year = {Tue Jun 28 00:00:00 EDT 2016},
month = {Tue Jun 28 00:00:00 EDT 2016}
}