Drift model of the cathode region of a glow discharge |
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Authors: | V Yu Kozhevnikov A V Kozyrev Yu D Korolev |
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Institution: | (1) Institute of High-Current Electronics, Siberian Division, Russian Academy of Sciences, Akademicheskiĭ pr. 4, Tomsk, 634055, Russia |
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Abstract: | A one-dimensional drift model of the cathode region of a glow discharge with allowance for both electron-impact ionization and charged particle loss is proposed. An exact solution to the model equations is obtained for the case of similar power-law dependences of the ion and electron drift velocities on the electric field strength. It is shown that, even in the drift approximation, a relatively wide transition layer in which the ion-to-electron current ratio approaches a constant value typical of the positive column of a glow discharge should occur between the thin space-charge sheath and the quasineutral plasma, the voltage drop across the space-charge sheath being comparable to that across the transition layer. The calculated parameters of the normal and anomalous glow discharges are in good agreement with available experimental data. |
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