The dependence of internal parameters of the electric fields in a high-frequency discharge on the discharge parameters

We study experimentally the constants of the electric fields which arise in a stationary high-frequency discharge. We study the dependence of the decay of the voltage of the constant electric field $V_{\sim}$ on the high-frequency voltage $V_{\sim}$, the gas pressure p, the frequency of the high-frequency fields f, the type of gas, and material of the electrodes. We study a symmetric high-frequency discharge in a tube with planar internal electrodes in helium and neon for p $\sim$ 10-1300 Pa in the frequency range 1-12 MHz, i.e., in conditions when $f/v\ll 1$, where v is the electron-atom collision frequency. We determine the specific methodological features of the experimental scheme for the measurement of $V_0$. In the condition under investigation, we observed values $V_0\le 1000$ V. It is established that the quantity $V_0$ depends considerably on the intensity of the emission processes which are determined by the combination of the working gas and the material of the electrode. The form of the observed dependence $V_0(f)$) depends considerably on the amplitude of the high-frequency voltage $V_{\sim}$ and, in the region of frequencies under investigation, is determined by the character of the ion motion in the vicinity of the discharge electrode.