Laser triggering sparkgap an‎d studying the effect of electrode sharpness

4/21/2027 12:00:00 AM

Plasma production through pulsed electrical discharge has been used for decades as one of the cornerstones in the development an‎d advancement of plasma technologies. This method is particularly important in areas that require precise control over plasma discharge an‎d production processes. Plasma from pulsed electrical discharge, often by a pre-ionization system It has a wide application in high-voltage switches for various industries, especially in the electrical sector, as well as in pulsed lasers for industrial an‎d medical purposes. The implementation of a pre-ionization system, often utilizing pulsed lasers in contemporary contexts, facilitates meticulous regulation of the discharge process. This precise control is essential to optimize the performance of the switches an‎d increase their stability an‎d longevity, as the discharge process is affected by several factors, such as electric field distribution, electrode geometry, an‎d pre-ionization conditions. In this dissertation, the main focus is on the design an‎d construction of a high-voltage pulsed electrical discharge system with laser pre-ionization. This system uses the Nd:YAG laser as a pre-ionization source, allowing for the detailed study of the physical an‎d dynamic processes of discharge. The purpose of this study is to investigate the effect of geometric an‎d physical parameters, especially the thickness of electrodes (1.5mm an‎d 3 cm), on the dynamic behavior of current an‎d other characteristics of plasma. The studied parameters included discharge delay time, failure voltage, an‎d switch stability. Detailed analysis of the measured parameters facilitated the diagnosis of the key factors affecting breakdown voltage, delay time (D.T), an‎d switching stability in the laser-stimulated pulsed discharge system. Laboratory results have shown that electrode thickness has a clear effect on the electric field distribution an‎d consequently on the dynamic behavior of the discharge current, with resistance dro‎pping rapidly to near zero. It has become clear that changes in electrode geometry led to variations in breakdown characteristics an‎d time stability of the switch. Combining laser pre-ionization with optimal electrode configuration has enabled improved control an‎d repeatability of the discharge process under high-voltage conditions. These results provide a practical basis for improving the design an‎d performance of laser-stimulated plasma switches in pulsed power systems.

تخليه الكتريكي پالسي , توليد پلاسما , پيشيونش ليزري

Pulsed Electrical Discharge , Plasma Generation , Laser Pre-ionization

Mustafa Khachi

Mohammad Hossein Mahdieh