The effects of total gas pressure and Xe partial pressure on the properties of plasma display panels with two-opposite-electrode cells

Ok, Jung‐Woo; Lee, Byoung-Seob; Choi, Seyong; Won, Mi‐Sook; Kim, Dong-Hyun; Lee, Hae June; Lee, Hojun

doi:10.1088/0963-0252/23/2/025018

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…The impact of energetic particles on the material surface is always associated with secondary electron emission (SEE) from it. This phenomenon is the basis for many essential technical applications such as scanning electron/ion microscopy [1], plasma sputtering [2], plasma thrusters [3] and plasma display panel [4] etc. The average number of secondary electrons (SEs) emitted when an ion strikes the surface is called an ion-induced secondary electron emission coefficient (SEEC, i g ).…”

Section: Introductionmentioning

confidence: 99%

Feedback model of secondary electron emission in DC gas discharge plasmas

Arumugam

Alex

Sinha

2018

Plasma Sci. Technol.

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Feedback is said to exist in any amplifier when the fraction of output power in fed back as an input. Similarly, in gaseous discharge ions that incident on the cathode act as a natural feedback element to stabilize and self sustain the discharge. The present investigation is intended to emphasize the feedback nature of ions that emits secondary electrons (SEs) from the cathode surface in DC gas discharges. The average number of SEs emitted per incident ion and non ionic species (energetic neutrals, metastables and photons) which results from ion is defined as effective secondary electron emission coefficient (ESEEC, E g). In this study, we derive an analytic expression that corroborates the relation between E g and power influx by ion to the cathode based on the feedback theory of an amplifier. In addition, experimentally, we confirmed the typical positive feedback nature of SEE from the cathode in argon DC glow discharges. The experiment is done for three different cathode material of same dimension (tungsten (W), copper (Cu) and brass) under identical discharge conditions (pressure: 0.45 mbar, cathode bias: −600 V, discharge gab: 15 cm and operating gas: argon). Further, we found that the E g value of these cathode material controls the amount of feedback power given by ions. The difference in feedback leads different final output i.e the power carried by ion at cathode (P i C ¢ |). The experimentally obtained value of P i C ¢ | is 4.28 W, 6.87 W and 9.26 W respectively for W, Cu and brass. In addition, the present investigation reveals that the amount of feedback power in a DC gas discharges not only affect the fraction of power fed back to the cathode but also the entire characteristics of the discharge.

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Section: Introductionmentioning

confidence: 99%

Feedback model of secondary electron emission in DC gas discharge plasmas

Arumugam

Alex

Sinha

2018

Plasma Sci. Technol.

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Wide-pressure-range coplanar dielectric barrier discharge: Operational characterisation of a versatile plasma source

et al. 2017

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Many plasma applications could benefit from the versatile plasma source operable at a wide-pressure-range, e.g., from the fraction of Pa to the super-atmospheric conditions. In this paper, the basic characteristics of wide-pressure-range plasma source based on the coplanar dielectric barrier discharge is given. The operational characteristics of this plasma source were measured in nitrogen at pressures ranging from 101 Pa (resp. 10−4 Pa) to 105 Pa. Measurements of the plasma geometry, breakdown voltage, and micro-discharges' behaviour revealed three operational regimes of this plasma source: “high pressure,” “transitional” and “low-pressure” with vague boundaries at the pressures of approx. 10 kPa and 1 kPa. It was found that the plasma layer of coplanar dielectric barrier discharge could be expanded up to several centimetres to the half-space above the planar dielectric barrier when the gas pressure is reduced below 1 kPa, which provides an outstanding space to tailor the source for the specific applications. The proposed model of an effective gap distance in the Paschen breakdown criterion enabled us to explain the discharge behaviour fitting the experimental breakdown voltage data in the whole studied pressure range. Under the filament-forming conditions, i.e., at the pressure range from approx. 1–100 kPa, the active plasma volume could be varied through the micro-discharges' lateral thickness scaling with the inverse of the square-root of the gas pressure.

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Simulation of Low Temperature Plasmas for an Ultra Violet Light Source using Coplanar Micro Dielectric Barrier Discharges

Bae

Lee

2016

Applied Science and Convergence Technology

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The discharge characteristics of pulse-driven coplanar micro barrier discharges for an ultraviolet (UV) light source using Ne-Xe mixture have been investigated using a two-dimensional fluid simulation at near-atmospheric pressure. The densities of electrons, the radiative excited states, the metastable excited states, and the power loss are investigated with the variations of gas pressure and the gap distance. With a fixed gap distance, the number of the radiative states Xe*( 3 P 1 ) increases with the increasing driving voltage, but this number shows weak dependency on the gas when that pressure is over 400 Torr. However, the number of the radiative states increases with the increase of the gap distance at a fixed voltage, while the power loss decreases. Therefore, a long gap discharge has higher efficiency for UV generation than does a short gap discharge. A slight change in the electrode tilt angle enhances the number of radiative species 2 or 3 times with the same operation conditions. Therefore, the intensity and efficiency of the UV light source can be controlled independently by changing the gap distance and the electrode structure.

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The effects of total gas pressure and Xe partial pressure on the properties of plasma display panels with two-opposite-electrode cells

Cited by 3 publications

References 18 publications

Feedback model of secondary electron emission in DC gas discharge plasmas

Feedback model of secondary electron emission in DC gas discharge plasmas

Wide-pressure-range coplanar dielectric barrier discharge: Operational characterisation of a versatile plasma source

Simulation of Low Temperature Plasmas for an Ultra Violet Light Source using Coplanar Micro Dielectric Barrier Discharges

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