Abstract

It is shown that the pressure and temperature of the radiating arc plasma can be determined from the measured values of the voltage on the plasma column, the discharge current and the photocurrent caused by the radiation flux of the entire volume of plasma to the photodetector. For the case of axially symmetric homogeneous arc plasma in a state of the local thermodynamic equilibrium, equations are formulated that connect the plasma parameters with the measurement results. The equation for the photocurrent is obtained from the solution of the radiation transfer equation in the arc plasma of the arbitrary optical density. The cases of electrode surfaces reflecting and absorbing electromagnetic radiation are considered. It is shown that the problem of determining the parameters of the arc plasma is reduced to solving a system of two non-linear equations with respect to pressure and temperature. The described method is used to determine plasma parameters of a high-current vacuum arc at the stage of the anode activity. The stability of the method with respect to the errors of the initial data is shown by the example of the vacuum arc plasma.

中文翻译：

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根据测量的光电流、电压和放电电流值确定辐射弧等离子体的压力和温度

摘要

结果表明，辐射弧等离子体的压力和温度可以通过测量等离子体柱上的电压、放电电流以及整个等离子体体积到光电探测器的辐射通量引起的光电流来确定。对于处于局部热力学平衡状态的轴对称均匀电弧等离子体的情况，建立了将等离子体参数与测量结果联系起来的方程。光电流方程是由任意光密度的电弧等离子体中的辐射传输方程的解得到的。考虑电极表面反射和吸收电磁辐射的情况。结果表明，确定电弧等离子体参数的问题可以简化为求解两个关于压力和温度的非线性方程组。所描述的方法用于确定阳极活动阶段高电流真空电弧的等离子体参数。通过真空电弧等离子体的例子显示了该方法相对于初始数据误差的稳定性。