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The charge deposited on the wall of a long discharge tube is measured both as a function of the distance from the electrodes and of the time elapsed since the ignition voltage is applied. The charging of the wall is accompanied by emission of light, indicating ionisation and excitation processes in the gas. A model for the starting processes is presented which takes into account the spatio-temporal behaviour of the plasma resistance.
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Horstman et al. (1988) studied this question.
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