研究目的
Investigating the switching process of a vacuum discharger ignited by a pulsed solid-state laser and the dependence of the response time on the energy of the igniting pulse of laser radiation and the thermodynamic characteristics of the target material.
研究成果
The study demonstrated that under the action of a laser pulse, an initial glow discharge is ignited in the erosion products of the electrodes, which then contracts into an arc channel due to ionization-superheating instability. The minimum and threshold energies required for ignition depend on the cathode material's thermodynamic properties.
研究不足
The study is limited to the materials tested and the specific conditions of the experiment, such as the laser pulse duration and the vacuum environment. The findings may not be directly applicable to other materials or conditions without further research.
1：Experimental Design and Method Selection:
The study involved the use of a pulsed solid-state laser operating in the Q-switched mode to ignite a vacuum discharger. The response time was measured as a function of the laser pulse energy and the thermodynamic characteristics of the target material.
2：Sample Selection and Data Sources:
The cathode materials tested included aluminum, tungsten, stainless steel, copper, tantalum, titanium, and graphite.
3：List of Experimental Equipment and Materials:
A pulsed solid-state laser LGI-60, a vacuum discharger with a flat cathode target and an aluminum anode, and a set of absorbing filters to vary the laser radiation energy.
4：Experimental Procedures and Operational Workflow:
The laser radiation was focused on the cathode surface, and the discharge current was measured. The time intervals between characteristic points on the current oscillograms were determined.
5：Data Analysis Methods:
The duration of time intervals was plotted against the laser pulse energy for various cathode materials to analyze the switching process.
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