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Journal Electromagnetic Waves and Electronic Systems №7 for 2016 г.
Article in number:
Processes on the cathode surfase glow discharge
Authors:
I.K. Belova - Ph. D. (Phys.-Math.), Kaluga branch of the Bauman MSTU
E.O. Deryugina - Ph. D. (Eng.), Kaluga branch of the Bauman MSTU. E-mail: bik23@yandex.ru
Abstract:
The theme of the research is: the optimal solution to the problem of selection of cold cathode materials, or rather their surface affect the spray material from which made the surface of the cathode.
The problem of selecting the parameters of the experimental method is too costly and time-consuming process. Collection and sys-tematization of the material in this region can reduce material and time costs of research, including software and simulation. In this case, the model will be established after these investigations.
On a cold cathode operation is influenced not only gas type and pressure, but also the state of the working surface of the cathode material, its emission and barrier properties. The space charge arising in the cathode region, leads to an increase of the field strength at the cathode surface, thus increases the energy of the positive ions bombarding the cathode surface. There is an effect of cathode sputtering, in which not only is absorbed and «immurement» gas active medium, and gradually destroyed the surface of the cathode.
To slow down the spraying process should be used, or protective films, or simulate different forms of relief.
Along with surface spray devices in the glow discharge as a cold cathode device absorbs gases from the volume. There undergoing complex processes perepyleniya and re-precipitation of the pulverized material.
The protective oxide layer on aluminum may be amorphous or crystalline in structure depending on the temperature. The outer loose layer of aluminum oxide films formed from the protective film due to moisture (hydration of aluminum oxide). In contrast to the pro-tective layer, loose layer of aluminum oxide film is less resistant to ion bombardment. Its thickness depends on the time and intensity of exposure to damaging environmental factors. Because of this the residence time of the aluminum film in air cathode limited. This fully applies to all the cold cathode including a magnesium oxide on the working surface. In order to reduce the degree of influence of this factor, a number of firms producing oxidation of the cold cathode glow discharge directly into the laser research results will be used later in the simulation.
On the durability of the cold cathode affect the thermodynamic reaction and the resulting relief. The research results will be used later in the simulation.
Pages: 76-80
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