研究目的
To numerically simulate the explosion of a surface microprotrusion under the action of a radio frequency electromagnetic field and compare it with the case of a dc field to support the hypothesis that both types of breakdown proceed by the same mechanism.
研究成果
The numerical simulation demonstrated that the explosion of a microprotrusion and the subsequent crater formation proceed identically under both dc and rf fields, supporting the hypothesis that both types of vacuum breakdown occur via the same explosive emission mechanism.
研究不足
The simulation assumes that explosive electron emission has already been initiated and focuses on the subsequent explosion process. The study does not explore the initiation mechanism of the explosive emission itself.
1：Experimental Design and Method Selection:
The study used a magnetohydrodynamic (MHD) code to simulate the explosion of a microprotrusion under both dc and rf fields. The simulation included solving the system of MHD equations in cylindrical coordinates.
2：Sample Selection and Data Sources:
The microprotrusion was modeled as a cylinder of radius 0.3 μm and length 1 μm on a plane copper cathode.
3：3 μm and length 1 μm on a plane copper cathode.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: The simulation utilized the JULIA MHD code for calculations.
4：Experimental Procedures and Operational Workflow:
The simulation involved setting boundary conditions for the equations of motion, energy balance, and Maxwell's equations, and solving them to observe the explosion process.
5：Data Analysis Methods:
The results were analyzed to compare the explosion processes under dc and rf fields, focusing on temperature, pressure, and material density distributions.
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