Ion sheath oscillations in double plasma machines

Piel, A.; Klostermann, H.; Rohde, Andreas; Jelić, N.; Schrittwieser, R.

doi:10.1016/0375-9601(96)00287-3

Cited by 22 publications

(23 citation statements)

References 19 publications

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“…The sheath instability is in many respects similar to that observed in double plasma devices [37,38,39,33,40,41]. The explanations for the instability mechanism differ widely [42,43,44].…”

Section: Discussionsupporting

confidence: 58%

“…The frequency of the instability is frequently discussed in terms of the ion transit time through a sheath which does not address the role of electrons in the sheath [33]. Here we take a different approach and consider the basic oscillation frequency of a charge layer in its own space charge electric field.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, slow electrons in the sheath appear to be associated with nonlinear oscillations. Previously, subharmonics have only been observed when the sheath instability is driven by an oscillating grid voltage [33]. For 39 Approved for public release; distribution unlimited V grid ≥ V emfil = −50 V the emitted electrons are collected by the grid and/or the probe whichever is more positive with respect to the emissive probe.…”

mentioning

confidence: 99%

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Experiments on Plasma Turbulence Created by Supersonic Plasma Flows with Shear

Stenzel¹,

Urrutia²

2014

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“…The sheath instability is in many respects similar to that observed in double plasma devices [37,38,39,33,40,41]. The explanations for the instability mechanism differ widely [42,43,44].…”

Section: Discussionsupporting

confidence: 58%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Experiments on Plasma Turbulence Created by Supersonic Plasma Flows with Shear

Stenzel¹,

Urrutia²

2014

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“…The sheath instability has been experimentally observed by many groups. [7][8][9][10][11][12][13][14][15] In Fig. 1, the growth rate against the inverse of the scale length is plotted for different electric field values.…”

Section: ͑15͒mentioning

confidence: 99%

“…The experimental observation of sheath instability in a double plasma device has been reported in the literature. 12,13 Although experimental details of different sheath experiment varies, [9][10][11][12][13][14] common features of observed sheath instability are the following: the oscillation frequency f (ϳ100 kHzϪ1 MHz) scales as the square root of the plasma number density in the source chamber, i.e, f ϰn s 1/2 and f scales with the grid bias as f ϰ Ϫ␣ with ␣ between 0.5 and 0.25. A different mechanism has been proposed to explain the sheath instability.…”

Section: Introductionmentioning

confidence: 99%

An explanation of the sheath instability

Pandey

Roy

2003

Physics of Plasmas

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When the sheath accelerates in its plasma–bound motion as a result of the ion response to the electric field, one has a top-heavy equilibrium. In the sheath frame ions are accelerated towards the wall–sheath boundary. In such a situation sheath may become unstable. The sheath instability is examined as the Rayleigh–Taylor (RT) instability and RT growth rate is compared with the reported sheath instability in the literature.

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Study of self‐organised criticality in a coaxial plasma source with gridded cathode

Bose

Paul

2022

Contributions to Plasma Physics

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Multiple luminous sheath structures develop in the localised plasma formation inside a cylindrical gridded cathode plasma source. These structures gradually expand into the whole vessel and undergo a critical state through self‐organised criticality (SOC) along with pronounced sheath oscillations during the variation of anode potential. The present investigation emphasises the stability properties associated with the oscillations of the sheath potential structures in the cylindrical‐gridded cathode in glow discharge regime through SOC phenomena through non‐linear time series analysis. The non‐linear temporal and spatial analysis of potential structure and dynamics of charged particles are correlated with SOC in cylindrical‐gridded cathode in glow discharge regime through the dynamics of multiple sheath structure formations. The existence of flicker noise and long‐range correlation in the time series suggests the existence of SOC behaviour in the system, the multiple sheath structures evolve through reduction and addition of layers. Cylindrical‐gridded cathode discharge initiation during formations of multiple sheath structures, switching of discharge regimes with anode potential, layer reduction and addition inside the sheath structures through SOC behaviour, renders uniqueness to the present regime of investigation. Self‐organised pattern formations and self‐organised criticality behaviour investigated in the present glow discharge regime using the cylindrical‐gridded cathode source are of prime importance to understand the complex behaviour of plasmas in the field of hollow cathode discharges.

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Ion sheath oscillations in double plasma machines

Cited by 22 publications

References 19 publications

Experiments on Plasma Turbulence Created by Supersonic Plasma Flows with Shear

Experiments on Plasma Turbulence Created by Supersonic Plasma Flows with Shear

An explanation of the sheath instability

Study of self‐organised criticality in a coaxial plasma source with gridded cathode

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