Reverse electric field in spherical striations

Новопашин, С. А.; Polyakov, А. А.; Radchenko, V. V.; Sakhapov, S. Z.

doi:10.1134/s1063785007030042

Cited by 10 publications

(13 citation statements)

References 8 publications

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“…3) corresponding to a stratified positive column of the gas discharge [11,12]. In strong spherical striations, regions with inverse electric fields can be formed [11]. These regions are placed near the strata glow regions and present potential wells for negatively charged dust particles.…”

Section: Methodsmentioning

confidence: 98%

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Dust Solitons in Reactive Plasma of a Spherical Glow Discharge

Sukhinin

Sakhapov

Fedoseev

et al. 2016

Contrib. Plasma Phys.

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The formation of clouds of dust particles at the edge of striations of a spherical discharge in ethanol was observed. Periodically, a dust cloud experienced sudden explosion, split into two clouds, which moved in the opposite directions (to the centre of spherical discharge and to the chamber wall). The velocity of the dust cloud was the exponentially decaying function of time with a surprisingly small damping rate as in the case of dissipative dust solitory waves.

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Section: Methodsmentioning

confidence: 98%

“…The radial distribution of electric potential U (r) has a non-homogeneous radial distribution ( Fig. 3) corresponding to a stratified positive column of the gas discharge [11,12]. In strong spherical striations, regions with inverse electric fields can be formed [11].…”

Section: Methodsmentioning

confidence: 99%

Dust Solitons in Reactive Plasma of a Spherical Glow Discharge

Sukhinin

Sakhapov

Fedoseev

et al. 2016

Contrib. Plasma Phys.

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“…So the emissivity (r, ) is (r, ) = (h) A N*(r) = (h) kex(r) Ne(r) N (Watts/cm 3 ) This gives us a "direct" measure of kex(r) Ne(r), which we will discuss in detail later on. (r, ) is relative, so we can choose an ro and calculate the ratio…”

Section: Experimental Observations: Striationsmentioning

confidence: 99%

“…Unlike most low pressure linear discharges in a tube in which the walls of the tube play a significant role in plasma stability, this spherical corona is a volume dominated plasma. Figure 3a shows the details of the first potential well taken from the published probe measurements of Novopashin, et al [3]. Using the smoothed curve through their measured points we have calculated and graphed in Fig.…”

Section: A the Positive Coronamentioning

confidence: 99%

Study of striations in a spherically symmetric hydrogen discharge

Morgan

Childs²

2015

Plasma Sources Sci. Technol.

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Experiments on a high power spherically symmetric positive corona discharge in molecular hydrogen are reported upon. These are collisional plasmas in the H2 pressure range of about 0.75 Torr to 3 Torr. Applied voltages ranged up to 600 V on the anode with currents ranging up to 3 A. As in prior published experiments going back to 1997 we observed spherically symmetric striations or double layers. Others have observed such striations in O2, CO2, and mixtures of N2 and acetone or methanol, or benzene. Like H2 all these gases, except N2 itself, readily dissociate and form negative ions by dissociative attachment with electrons. We propose that the striations are instabilities arising from copious formation of negative ions that modify the radial space charge and electric field distributions in such high aspect ratio spherical discharges.

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“…The charged particles are acted upon by the plasma electrostatic forces. The radial component of the electric field E r (r) has a non-homogeneous radial distribution corresponding to a stratified positive column of gas discharge [20,21]. In the strong spherical striations, regions with inverse (negative) electric fields can be formed [20].…”

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confidence: 99%

Formation and dynamics of nano-particles in a stratified spherical glow discharge

Sakhapov

Fedoseev

Sukhinin

et al. 2015

EPL

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The formation of clouds of dust nano-particles in a spherical dc glow discharge in ethanol was observed. Nano-particles were formed in a process of coagulation of ethanol dissociation products in a plasma of gas discharge. During the process the particles were captured into clouds in the electric potential wells of the strong striations of a spherical discharge. Periodically, the cloud of nano-particles experienced some sudden instability (explosion), and started to move to the cathode at high velocity. It was proved that the velocity of the particle clouds was an exponentially decaying function of time as in the case of dissipative dust solitary waves.

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Reverse electric field in spherical striations

Cited by 10 publications

References 8 publications

Dust Solitons in Reactive Plasma of a Spherical Glow Discharge

Dust Solitons in Reactive Plasma of a Spherical Glow Discharge

Study of striations in a spherically symmetric hydrogen discharge

Formation and dynamics of nano-particles in a stratified spherical glow discharge

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