Effect of low-frequency instability on hall conductivity in plasma

Xaplanteris, C. L.

doi:10.1007/bf00644352

Cited by 7 publications

(8 citation statements)

References 4 publications

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“…Just as it was shown in previous publications of our Laboratory (Xaplanteris 1987(Xaplanteris , 2009Xaplanteris and Filippaki 2011), an Argon plasma may light within a large value range of the external plasma parameters (gas pressure p, rf-field power P, magnetic field stress B). Those large value ranges lead to an extension of plasma parameters range as well.…”

Section: Measurements and Resultsmentioning

confidence: 84%

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

et al. 2011

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Many experimental data along with their theoretical interpretations on the rf low-temperature cylindrical plasma have been issued until today. Our Laboratory has contributed to that research by publishing results and interpretative mathematical models. With the present paper, two issues are being examined; firstly, the estimation of electron drift caused by the rf field gradient, which is the initial reason for the plasma behaviour, and secondly, many new experimental results, especially the electron-neutral collision frequency effect on the other plasma parameters and quantities. Up till now, only the plasma steady state was taken into consideration when a theoretical elaboration was carried out, regardless of the cause and the effect. This indicates the plasma's complicated and chaotic configuration and the need to simplify the problem. In the present work, a classification about the causality of the phenomena is attempted; the rf field gradient electron drift is proved to be the initial cause.

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Section: Measurements and Resultsmentioning

confidence: 84%

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

et al. 2011

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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%

“…The first kind of waves is caused by the radial rf-field gradient, 27,29 since the second and third kind are identified as electron-neutral and ion-neutral collisional waves, respectively. …”

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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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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“…The first kind of wave is caused by the radial rf-field gradient [21,23] , whereas the second and the third kind are identified as electron-neutral and ion-neutral collisional waves, respectively [22] . Fig.…”

Section: Plasma Production-plasma Wavesmentioning

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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Effect of low-frequency instability on hall conductivity in plasma

Cited by 7 publications

References 4 publications

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

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

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

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