Abstract

Propagation velocity of a subthreshold microwave discharge in air and carbon dioxide is measured at various gas pressures and intensities of microwave radiation. At air pressures of 200, 390, and 738 Torr and carbon dioxide pressures of 390 and 750 Torr, the propagation velocity of the head part of the self-non-self-sustained discharge closely follows a quadratic power law as a function of microwave-beam intensity in the range from 4 to 16 kW/cm², while decreasing directly proportional to the initial gas density. In the process, the discharge propagation velocities in carbon dioxide are twice lower that those in air at equal intensities of the microwave radiation. The temperature in the head part of the discharge in air reaches 3.5–5.5 kK, while that in carbon dioxide reaches 9–15 kK.

中文翻译：

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在不同气压下空气和二氧化碳中亚阈值微波放电的参数与微波场的关系

摘要

在各种气压和微波辐射强度下，测量空气和二氧化碳中亚阈值微波放电的传播速度。在200、390和738 Torr的气压以及390和750 Torr的二氧化碳压力下，自持放电的头部的传播速度紧密遵循二次幂定律，该定律是微波的函数，射束强度在4至16 kW / cm ²的范围内，而与初始气体密度成正比地降低。在此过程中，在微波辐射强度相同的情况下，二氧化碳中的放电传播速度比空气中的放电传播速度低两倍。空气中排放物的头部温度达到3.5–5.5 kK，而二氧化碳中的温度达到9–15 kK。