A Waveguide-Based Launcher to Sustain Long Plasma Columns through the Propagation of an Electromagnetic Surface Wave

Moisan, M.; Zakrzewski, Z.; Pantel, R.; Leprince, P.

doi:10.1109/tps.1984.4316320

Cited by 107 publications

(59 citation statements)

References 34 publications

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“…As shown in Figure 2, the feed line of the microwave is terminated by a moveable short (a microwave plunger). In order to facilitate impedance tuning, a movable short was embedded on one side of the Microwave Plasma Source; changing the position of this plunger caused it to match the impedance of the plasma column [12]. Two circular holes are made in the centre of the reduced-height section of the surfaguide through its wide walls to develop a launching gap, where a surface wave can be excited in both directions.…”

Section: Plasma Antenna Using Surfaguidementioning

confidence: 99%

“…In the capacitive discharges [11], a surface wave is propagated along the plasma column using a capacitive coupling, in which there is an intense field between the ground plane and a copper ring placed around the tube. The surfaguide is another device, first introduced in [12], that can be used as a plasma source. It is a simple surface-wave launcher in which a waveguide device can propagate a surface wave along the tube for plasma discharge.…”

Section: Introductionmentioning

confidence: 99%

“…For highly compact design with low cost and high reliability, single layer microstirp-to-waveguide transitions have been developed [9][10][11], but narrow frequency bandwidth is an essentially unavoidable disadvantage. Broad frequency bandwidth could be obtained by placing a quasi-Yagi antenna in the waveguide [12]. However, since the microstrip line is parallel to the waveguide, these transitions are not well suited to general circuit integration.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Theoretical and experimental investigations of surface-waves plasma column and microwave plasma source for applications in reconfigurable plasma antenna

Abbasi

Asadi

2017

Microw. Opt. Technol. Lett.

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In this paper, we have investigated plasma column excited by surface-waves using monopole plasma antenna. Since the plasma frequency has an important role in conductivity of the plasma column and antenna radiation characteristics, determining the distribution electron density and plasma frequency in the inhomogeneous plasma column axis is particularly important. For this purpose, the plasma column is modelled by fluid equations for high-frequency discharges. Because of significant advantages such as high power handling capability at 2.45 GHz, the surfaguide launcher is chosen from the other conventional launchers to propagate the surface wave along plasma column. The surfaguide is experimentally excited an argon gas-filled tube at a pressure of 0.2 torr as a surface-wave plasma source. In this work, because of safety considerations about high power radiation, plasma frequency measurements was impractical using conventional methods. Therefore, a new system is designed consists of a solid-state VCO, amplifier, circulator, attenuator and two double-ridged horn antennas. The plasma frequency is obtained close to 5.7 GHz, which is consistent with theoretical concepts.

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Section: Plasma Antenna Using Surfaguidementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Theoretical and experimental investigations of surface-waves plasma column and microwave plasma source for applications in reconfigurable plasma antenna

Abbasi

Asadi

2017

Microw. Opt. Technol. Lett.

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“…There are some microwave plasma torches but most of them have disadvantages: They only have very small plasma volumes, need additional igniters, need cooling of the plasma reactor or can only be operated in pulsed mode [10][11][12][13][14][15][16][17][18] . The microwave plasma torch presented in this movie offers an ignition of the plasma solely with the provided microwave power with no additional igniters as well as a stable and continuous operation without any cooling of the plasma reactor for a broad range of operation parameters and can be used for all of the above mentioned applications.…”

Section: Introductionmentioning

confidence: 99%

How to Ignite an Atmospheric Pressure Microwave Plasma Torch without Any Additional Igniters

Leins

Gaiser

Schulz

et al. 2015

JoVE

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This movie shows how an atmospheric pressure plasma torch can be ignited by microwave power with no additional igniters. After ignition of the plasma, a stable and continuous operation of the plasma is possible and the plasma torch can be used for many different applications. On one hand, the hot (3,600 K gas temperature) plasma can be used for chemical processes and on the other hand the cold afterglow (temperatures down to almost RT) can be applied for surface processes. For example chemical syntheses are interesting volume processes. Here the microwave plasma torch can be used for the decomposition of waste gases which are harmful and contribute to the global warming but are needed as etching gases in growing industry sectors like the semiconductor branch. Another application is the dissociation of CO 2 . Surplus electrical energy from renewable energy sources can be used to dissociate CO 2 to CO and O 2 . The CO can be further processed to gaseous or liquid higher hydrocarbons thereby providing chemical storage of the energy, synthetic fuels or platform chemicals for the chemical industry. Applications of the afterglow of the plasma torch are the treatment of surfaces to increase the adhesion of lacquer, glue or paint, and the sterilization or decontamination of different kind of surfaces. The movie will explain how to ignite the plasma solely by microwave power without any additional igniters, e.g., electric sparks. The microwave plasma torch is based on a combination of two resonators -a coaxial one which provides the ignition of the plasma and a cylindrical one which guarantees a continuous and stable operation of the plasma after ignition. The plasma can be operated in a long microwave transparent tube for volume processes or shaped by orifices for surface treatment purposes. Video LinkThe video component of this article can be found at

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“…Since it has been found that surface wave plays an important role in sustaining an overdense plasma (3) , therefore, several works have been performed in this area (4) (5) . Usually for the computer simulation of surface wave produced plasma, the Finite Element Method (FEM) (6) or the Finite Difference Time Domain Method (FD-TD) (7) are employed.…”

Section: Introductionmentioning

confidence: 99%

Application of Perfectly Matched Layer Absorbing Boundary Conditions for Propagation of Surface Wave on the Long Plasma Cable

et al. 2004

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We have developed a computer code for the simulation of large scale SWP plasma excited by a long coaxial antenna with a VHF wave of 300 MHz, this antenna is located along the center axis of a cylindrical chamber. The antenna used in this model structure is so long that the computational region has become very large. Therefore, for the calculation of the electromagnetic field profile in order to design a long and large scale SWP plasma, it is necessary to apply a proper boundary condition to truncate the computational region, and from this viewpoint we have introduced the PML absorbing boundary conditions and have studied the effectiveness of this boundary conditions for our purposes.

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A Waveguide-Based Launcher to Sustain Long Plasma Columns through the Propagation of an Electromagnetic Surface Wave

Cited by 107 publications

References 34 publications

Theoretical and experimental investigations of surface-waves plasma column and microwave plasma source for applications in reconfigurable plasma antenna

Theoretical and experimental investigations of surface-waves plasma column and microwave plasma source for applications in reconfigurable plasma antenna

How to Ignite an Atmospheric Pressure Microwave Plasma Torch without Any Additional Igniters

Application of Perfectly Matched Layer Absorbing Boundary Conditions for Propagation of Surface Wave on the Long Plasma Cable

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