The missing modes of self-organization in cathode boundary layer discharge in xenon

Zhu, Weidong; Niraula, Prajwal

doi:10.1088/0963-0252/23/5/054011

Cited by 21 publications

(48 citation statements)

References 9 publications

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“…It has been found that there is a palindromic series of the number of spots with discharge current, which is consistent with observations of switching between modes with different patterns in the experiment [10].…”

Section: Discussionsupporting

confidence: 89%

“…[15]. The images in figure 5 can be compared to experimentally observed patterns of spots, figure 2 of [10]. The computed evolution from the abnormal mode into mode a 4 b 4 , comprising four spots, is in good agreement with the experimentally observed transition between the abnormal mode into a mode comprising four spots.…”

Section: D Modessupporting

confidence: 68%

“…A range of experimental reports have since been published [1][2][3][4][5][6][7][8][9][10]. Modelling of the phenomenon [9,[11][12][13][14][15] has revealed, in agreement with the general theory of cathode spots and patterns in arc and DC glow discharges [16], the existence of multiple steady-state solutions for a given value of discharge current, which comprise modes of current transfer associated with different cathode spot patterns.…”

Section: Introductionmentioning

confidence: 64%

“…In figure 2 of [10], it can be seen how the modes appear in the experiment: starting from the abnormal mode and reducing discharge current, a mode comprising four spots appears. As current is further reduced, modes comprising five and six spots appear.…”

Section: D Modesmentioning

confidence: 99%

“…The vast majority of the experiments [1][2][3][4][5][6][7][8][9][10] have been performed in a discharge device comprising a flat cathode and a ring-shaped anode, separated by a dielectric (cf., e.g., figure 1 of [10]); this discharge configuration is called cathode boundary layer discharge (CBLD) by the authors of the experiment. However, the modelling has been performed up to date for discharges with parallel-plane electrodes only [9,[11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Modelling cathode spots in glow discharges in the cathode boundary layer geometry

Bieniek¹,

Almeida²,

Benilov³

2016

J. Phys. D: Appl. Phys.

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Self-organized patterns of cathode spots in glow discharges are computed in the cathode boundary layer geometry, which is the one employed in most of the experiments reported in the literature. The model comprises conservation and transport equations of electrons and a single ion species, written in the drift-diffusion and local-field approximations, and Poisson's equation. Multiple solutions existing for the same value of the discharge current and describing modes with different configurations of cathode spots are computed by means of a stationary solver. The computed solutions are compared to their counterparts for plane-parallel electrodes, and experiments. All of the computed spot patterns have been observed in the experiment.

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Section: Discussionsupporting

confidence: 89%

Section: D Modessupporting

confidence: 68%

Section: Introductionmentioning

confidence: 64%

Section: D Modesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Modelling cathode spots in glow discharges in the cathode boundary layer geometry

Bieniek¹,

Almeida²,

Benilov³

2016

J. Phys. D: Appl. Phys.

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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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In vitro Demonstration of Cancer Inhibiting Properties from Stratified Self-Organized Plasma-Liquid Interface

Chen

Zhang

Levchenko

et al. 2017

Sci Rep

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Experiments on plasma-liquid interaction and formation of thinly stratified self-organized patterns at plasma-liquid interface have revealed a nontrivial cancer-inhibiting capability of liquid media treated at self-organized interfacial patterns. A pronounced cancer suppressing activity towards at least two cancer cells, breast cancer MDA-MB-231 and human glioblastoma U87 cancer lines, was demonstrated in vitro. After a short treatment at the thinly stratified self-organized plasma-liquid interface pattern, the cancer inhibiting media demonstrate pronounced suppressing and apoptotic activities towards tumor cells. Importantly, this would have been impossible without interfacial stratification of plasma jet to thin (of several µm) current filaments, which plays a pivotal role in building up the cancer inhibition properties. Furthermore, thinly stratified, self-organized interfacial discharge is capable to efficiently control the ROS and RNS concentrations in the cancer-inhibiting media. In particular, abnormal ROS/RNS ratios are not achievable in discharges since they do not form stratified thin-filament patterns. Our findings could be tremendously important for understanding the cancer proliferation problem and hence, the potential of this approach in tackling the challenges of high cancer-induced mortality should be explored.

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The missing modes of self-organization in cathode boundary layer discharge in xenon

Cited by 21 publications

References 9 publications

Modelling cathode spots in glow discharges in the cathode boundary layer geometry

Modelling cathode spots in glow discharges in the cathode boundary layer geometry

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

In vitro Demonstration of Cancer Inhibiting Properties from Stratified Self-Organized Plasma-Liquid Interface

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