Electron drift caused by rf field gradient creates many plasma phenomena: An attempt to distinguish the cause and the effect

Xaplanteris, C. L.; Filippaki, Eleni; Mistakidis, I.S.; Xaplanteris, L.

doi:10.1017/s0022377811000535

Cited by 3 publications

(8 citation statements)

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“…[27][28][29][30][31] A steady steel cylindrical cavity of 6 cm internal diameter, with its' length adaptable to any purpose, is used almost always, as it is preferable due to its' cylindrical symmetry simplicity. The argon-plasma is usually produced due to the argon atoms inertia and its' low penetration.…”

Section: A Experimental Set-up Descriptionmentioning

confidence: 99%

“…In a previous publication, 31 a complete study of the plasma external parameters, such as gas pressure, rf wave power and magnetic field intensity, has been given. In the present paper, the external parameters and the plasma quantities are summarized in Table I.…”

Section: B Plasma Production-plasma Wavesmentioning

confidence: 99%

“…These examples that are mentioned above were selected from the previous work on the plasma waves, which has been carried out at the our Plasma Laboratory 29,31 and presented as the first involvement with the topic.…”

Section: Introductionmentioning

confidence: 99%

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Approximate models for the study of exponential changed quantities: Application on the plasma waves growth rate or damping

Xaplanteris

Leousis³

2014

AIP Advances

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Many physical phenomena that concern the research these days are basically complicated because of being multi-parametric. Thus, their study and understanding meets with big if not unsolved obstacles. Such complicated and multi-parametric is the plasmatic state as well, where the plasma and the physical quantities that appear along with it have chaotic behavior. Many of those physical quantities change exponentially and at most times they are stabilized by presenting wavy behavior. Mostly in the transitive state rather than the steady state, the exponentially changing quantities (Growth, Damping etc) depend on each other in most cases. Thus, it is difficult to distinguish the cause from the result. The present paper attempts to help this difficult study and understanding by proposing mathematical exponential models that could relate with the study and understanding of the plasmatic wavy instability behavior. Such instabilities are already detected, understood and presented in previous publications of our laboratory. In other words, our new contribution is the study of the already known plasmatic quantities by using mathematical models (modeling and simulation). These methods are both useful and applicable in the chaotic theory. In addition, our ambition is to also conduct a list of models useful for the study of chaotic problems, such as those that appear into the plasma, starting with this paper's examples. C 2014 Author(s)

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Section: A Experimental Set-up Descriptionmentioning

confidence: 99%

Section: B Plasma Production-plasma Wavesmentioning

confidence: 99%

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Approximate models for the study of exponential changed quantities: Application on the plasma waves growth rate or damping

Xaplanteris

Leousis³

2014

AIP Advances

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“…By using the combination of a rotary and a diffusion pump (Balzers type) connected with the cylindrical cavity, the argon pressure can be adjusted for the plasma to operate within a wide region of pressure. In a previous publication [25] , a complete study of plasma external parameters, such as gas pressure, rf wave power and magnetic field intensity, has been given. In the present paper, the external parameters and the plasma quantities are summarized in Table 1.…”

Section: Plasma Production-plasma Wavesmentioning

confidence: 99%

“…c. Conversion rate The conversion rate dN dt is calculated from the derivative of relation (25). The derivative with respect to the variable time is,…”

Section: Study On Law (25)mentioning

confidence: 99%

An Attempt to Study on the Growth and Damping Rates with Approximate Solutions by Using Mathematical Models

Xaplanteris¹,

Xaplanteris²,

Leousis³

2014

Plasma Sci. Technol.

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As is already known, most of the plasma literature is occupied with the plasma instabilities and the inevitable plasma waves, which remain major obstacles to the thermonuclear fusion process. Many experimental data on the plasma waves (growth or damping) and their accompanied theoretical interpretations have been published during the last five decades; lots of them have been identified and justified as well, some not yet. One of these is our previous research on plasma waves, which originated in the early 80's at the Plasma Physics Laboratory of the NCSR "Demokritos". As the wave rising is defined by the growth rate (or the damping on the extinguishment), these important wavy quantities will be studied in detail in the present paper. Three examples are taken from our previous theoretical results, and the first observation reveals that the involved quantities are complicated enough to be studied by themselves. So, the use of suitable approach models, which may interpret the experimental wavy quantities, is the central idea of the present attempt. Furthermore, calculations with a little change of the initial conditions have been repeated in order to determine whether the plasma behaves as a chaotic medium.

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Calculation of Effective Molecules Collision Frequency and Cross-Sectional Ratio for Electromagnetic Discharge in Various Gases Mixtures

Mohammad¹

2015

JNUS

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Estimation of gases quantities in gases mixture in plasma were accomplished at 300K. Each mixture has an effective value of the molecular collision frequency, electro-ions collision frequency and collision cross-sectional ratio. The computational and experimental results are correlated. In this work, the concept of separate control ion energy and ion flux by the two frequencies works generally well for the investigated discharge setup. The high frequency mainly determines ion flux and radical formation in the mixture discharges while ion energies are strongly influenced by the low frequency. Deviations from an ideally separated control of ion flux and energy are caused by influences on discharge parameters and interaction between the two frequencies since the radio frequency (RF) power sources are coupled to each other in the current setup.

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Electron drift caused by rf field gradient creates many plasma phenomena: An attempt to distinguish the cause and the effect

Cited by 3 publications

References 20 publications

Approximate models for the study of exponential changed quantities: Application on the plasma waves growth rate or damping

Approximate models for the study of exponential changed quantities: Application on the plasma waves growth rate or damping

An Attempt to Study on the Growth and Damping Rates with Approximate Solutions by Using Mathematical Models

Calculation of Effective Molecules Collision Frequency and Cross-Sectional Ratio for Electromagnetic Discharge in Various Gases Mixtures

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