Evaluation of plasma pressure of high current low inductance vacuum spark on cathode surface

9th International Conference on Modern Techniques of Plasma Diagnostics and their Application

Sarantsev, S.A.^1

National Research Nuclear University MEPhI, Kashirskoe shosse 31, Moscow

115409, Russia^1

关键词: Cathode surface;    Discharge currents;    Electrical measurement;    Electrode material;    High energy plasmas;    Macrostructures;    Multi-grid probe;    Plasma pressures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/666/1/012028/pdf
DOI  :  10.1088/1742-6596/666/1/012028

来源: IOP

【 摘 要 】

This paper presents evaluation of the plasma pressure in a high current, low inductance vacuum spark on the cathode surface (the electrode material is steel). Calculations are provided for the first half period of the discharge, wherein the cathode surface is subjected to the most severe impacts (micropinches are created resulting in high-energy plasma beams). The evaluations were made using the experimental data obtained on the Pion device. The data of electrical measurements of the discharge current, the average plasma flow values obtained with the multi-grid probe and the data from a cathode macrostructure study were used. The results are given for different values of the discharge current.