Field strength threshold of common discharge gases breakdown

All right reserved. In order to study the properties of gas breakdown while plasma occurs, the threshold value was calculated according to the model of field strength threshold under the lower atmospheric pressure. Six kinds of common discharge gases including helium, neon, argon, krypton, xenon, and mercury vapor were taken into account. Moreover, the related change rule was analyzed and described with the incident frequency, electron temperature, gas pressure, and gas temperature considered. The results show that the gas breakdown threshold is affected by the four factors mentioned above. On the one hand, it decreases while the gas pressure increases. On the other hand, it increases with the gas temperature, electron temperature, and incident frequency increasing. The effects of the gas pressure and incident frequency play more of a role than that of gas temperature and electron temperature. The value of breakdown threshold changes about 100 V/m due to the influence of gas pressure. Similarly, it changes 50 V/m to 300 V/m, and 20 V/m to 30 V/m with the effects of incident frequency and gas or electron temperature thought about. What's more, the change rule is found to be similar for all kinds of charge gases when the effects of gas pressure, gas temperature, and electron temperature are thought over. But it varies while the incident frequency is considered. In addition, xenon has the smallest threshold value while helium having the largest one among the gases studied.