INLUENCE OF THE ELECTRIC FIELD AND MAGNETIC FIELD ON DEBYE LENGTH, LONDON LENGTH AND KELVIN LENGTH
Résumé
Deeply linked with ElectroMagnetic Compatibility (EMC) issues, plasma generation is often in non-thermal equilibrium. For instance, in several applications such as discharge with liquid non-metallic electrodes, radio frequency (RF) plasmas, circuit breakers, arc tracking, the electrons reach a temperature higher than the ions and neutral temperature. The interaction between charged particles plays a key role. In such plasma, the influence of the Debye length can lead to an overestimation of about a factor of ten in the determination of electrical conductivity for higher temperature due to the electrostatic potential shielding. The same remark can be made to the magnetic shielding leading to an overestimation of the skin effect. The non-ideality definition of the plasma has been well established at thermal equilibrium. In this paper, we would like to establish the limit of the validity of the Debye length, and the London length in plasmas at and out of thermal equilibrium. The Kelvin length (skin effect) is also study in plasma for frequency of 13.56 MHz and 60 MHz. We applied the calculation in an argon plasma.