Unipolar ion sheath

Riemann, K.‐U.; Tsendin, L. D.

doi:10.1063/1.1413953

Cited by 25 publications

(25 citation statements)

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“…³ÎÇAEÖâ ÕÇÓÏËÐÑÎÑÅËË, ÒÓÇAEÎÑÉÇÐÐÑÌ Ä ÔÕÂÕßÇ ²ËÏÂ-ÐÂ Ë¸ÇÐAEËÐÂ [25], ÃÖAEÇÏ ÅÑÄÑÓËÕß, ÚÕÑ AEÇÃÂÇÄÔÍËÌ ÔÎÑÌ ÐÂ ÒÑÄÇÓØÐÑÔÕË ÒÎÂÊÏÞ ÑÕAEÇÎÈÐ ÑÕ ÍÑÎÎÇÍÕÑÓÂ ËÑÐÑÄ ÖÐËÒÑÎâÓÐÞÏ ÔÎÑÇÏ, Ä ÍÑÕÑÓÑÏ ÒÑÕÇÐÙËÂÎ ÒÓËÃÎËÉÈÐ-ÐÑ ÒÑAEÚËÐâÇÕÔâ ÊÂÍÑÐÖ ¹ÂÌÎAEÂ ë ÇÐÅÏáÓÂ [26,27]. £ ÔÖÏÏÇ AEÇÃÂÇÄÔÍËÌ Ë ÖÐËÒÑÎâÓÐÞÌ ÔÎÑË ÑÃÓÂÊÖáÕ ÕÂÍ ÐÂÊÞÄÂÇÏÞÌ ÎÇÐÅÏáÓÑÄÔÍËÌ ÔÎÑÌ [25,28].…”

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“…£ ÔÖÏÏÇ AEÇÃÂÇÄÔÍËÌ Ë ÖÐËÒÑÎâÓÐÞÌ ÔÎÑË ÑÃÓÂÊÖáÕ ÕÂÍ ÐÂÊÞÄÂÇÏÞÌ ÎÇÐÅÏáÓÑÄÔÍËÌ ÔÎÑÌ [25,28]. ¡ÐÂÎËÕËÚÇÔÍÂâ ÕÇÑÓËâ ÒÎÂÊÏÇÐÐÑÅÑ àÏËÕÕÇÓÂ ÑÅÓÂ-ÐËÚËÄÂÇÕÔâ ÑAEÐÑÏÇÓÐÞÏË ÏÑAEÇÎâÏË.°AEÐÑÏÇÓÐÂâ ÕÇÑ-ÓËâ ÒÓËÊÄÂÐÂ ÒÑÏÑÚß Ô×ÑÓÏÖÎËÓÑÄÂÕß ÅÓÂÐËÚÐÞÇ ÖÔÎÑ-ÄËâ AEÎâ ÚËÔÎÇÐÐÞØ ÍÑAEÑÄ, ÍÑÕÑÓÞÇ ÒÓËÏÇÐâáÕÔâ AEÎâ ÓÂÔÚÈÕÂ ÓÇÂÎßÐÞØ ËÔÕÑÚÐËÍÑÄ ÊÂÓâÉÇÐÐÞØ ÚÂÔÕËÙ.…”

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“…ªÔÕÑÓËâ ÑÕÍÓÞÕËâ ÍÓËÕÇÓËâ ¢ÑÏÂ, Â ÕÂÍÉÇ ÔÑÃÞÕËâ, ÒÓÇAEÛÇÔÕÄÑÄÂÄÛËÇ àÕÑÏÖ ÑÕÍÓÞÕËá Ë ÒÑÔÎÇAEÑÄÂÄÛËÇ ÊÂ ÐËÏ, ÑÒËÔÂÐÞ Ä ÔÕÂÕßÇ ¡ÎÎÇÐÂ [37]. ¢ÑÎÇÇ ÕÑÚÐÑÇ ÑÒËÔÂÐËÇ ÒÓÇAEÎÑÉÇÐÑ ²ËÏÂÐÑÏ Ë¸ÇÐ-AEËÐÞÏ [25]. ±ÑÄÕÑÓââ ËØ ÓÂÔÔÖÉAEÇÐËâ, ÐÂÚÐÈÏ Ô ÖÓÂÄ-ÐÇÐËâ (9), ÒÑAEÔÕÂÄËÄ ÕÖAEÂ u 0 1:…”

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Theory of plasma emitter of positive ions

Kotel'nikov¹,

Astrelin²

2015

Usp. Fiz. Nauk

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Section: £äçAeçðëçunclassified

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Theory of plasma emitter of positive ions

Kotel'nikov¹,

Astrelin²

2015

Usp. Fiz. Nauk

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“…This phase, the matrix extraction phase, lasts until all ions of the initial matrix have been extracted to the wall. The sheath expansion continues until a steady state is reached that can be approximated by the Child-Langmuir 4 law or by an improved model 5,6 describing the stationary unipolar ion sheath. This late phase, however, is characterized by a low ion current to the wall and is of minor interest for the application in PIII.…”

Section: Introductionmentioning

confidence: 99%

Relaxation of a collisionless ion matrix sheath

Israel

Riemann

Tsendin

2004

Journal of Applied Physics

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Articles you may be interested inThe positive ion temperature effect in magnetized electronegative plasma sheath with two species of positive ions Phys.Analytical model of the relaxation of a collisionless ion matrix sheath An analytical fluid model describing the time evolution of a collisionless ion sheath in front of a plane absorbing wall biased to pulsed high negative voltage is presented. The model utilizes the Lagrangian formulation of hydrodynamics and allows one to extend and generalize previous results for the matrix relaxation process obtained from the usual Euler formulation of hydrodynamics. Investigating the sheath evolution, the different phases of the matrix extraction and sheath expansion are characterized and treated separately. Considering the matrix extraction phase, a description is developed that, in principle, is suitable to account for arbitrary inhomogeneous initial conditions. Explicit results are given for two initial conditions of special interest. The end of the matrix extraction phase manifests itself in a distinct ''kink'' in the numerical solutions. By an investigation of the transition between the matrix extraction and sheath expansion phases, it is shown that this kink is due to a changing type of the ion orbits striking the wall. In order to describe the late quasistatic sheath expansion phase, the sheath boundary evolution is approximated and corresponding solutions are presented. The analytical results are compared with numerical solutions of the fluid equations as well as of a kinetic particle-in-cell/Monte-Carlo simulation and show convincing agreement.

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“…Indeed, at the background pressure of about 5 Torr, the mean free path of electron-neutral collisions is n ϳ2ϫ10 Ϫ3 cm, that is much smaller than the probe radius R p ϭ250ϫ10 Ϫ3 cm. Estimation of the sheath thickness 19 yields hϳ0.3ϫ10 Ϫ3 cm. Thus, we should suppose that at Pϳ5 Torr R p ӷ n ӷh.…”

Section: Gas Discharge Mode Of Fps Operationmentioning

confidence: 99%

Operation of ferroelectric plasma sources in a gas discharge mode

Dunaevsky

Fisch

2004

Physics of Plasmas

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Ferroelectric plasma sources in vacuum are known as sources of ablative plasma, formed due to surface discharge. In this paper, observations of a gas discharge mode of operation of the ferroelectric plasma sources (FPS) are reported. The gas discharge appears at pressures between ∼20 and ∼80 Torr. At pressures of 1–20 Torr, there is a transition from vacuum surface discharge to the gas discharge, when both modes coexist and the surface discharges sustain the gas discharge. At pressures between 20 and 80 Torr, the surface discharges are suppressed, and FPS operates in pure gas discharge mode, with the formation of almost uniform plasma along the entire surface of the ceramics between strips. The density of the expanding plasma is estimated to be about 1013 cm−3 at a distance of 5.5 mm from the surface. The power consumption of the discharge is comparatively low, making it useful for various applications. This paper also presents direct measurements of the yield of secondary electron emission from ferroelectric ceramics, which, at low energies of primary electrons, is high and dependent on the polarization of the ferroelectric material.

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Unipolar ion sheath

Cited by 25 publications

References 13 publications

Theory of plasma emitter of positive ions

Theory of plasma emitter of positive ions

Relaxation of a collisionless ion matrix sheath

Operation of ferroelectric plasma sources in a gas discharge mode

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