研究目的
To improve the electronic transmission of the grid in field emission by using a double grid structure.
研究成果
The dual grid structure is effective to improve transmission, with the electron interception rate of the grid2 being less than 10% under low emission current. However, the alignment accuracy between the two grids needs improvement.
研究不足
The alignment accuracy between the two grids still needs to be improved.
1:Experimental Design and Method Selection:
A dual-grid structure is adopted to reduce the grid electron interception. The structure includes a cathode, an anode, grid1, and grid2, with grid1 and grid2 separated by a certain distance and grid1 covering the cathode surface.
2:Sample Selection and Data Sources:
The CST software is used to simulate the dual-grid field emission characteristic.
3:List of Experimental Equipment and Materials:
Carbon nano-tube cathode closely attached to the grid1, and the distance between the grid1 and the grid2 is
4:2 mm. Experimental Procedures and Operational Workflow:
The CST software simulation results are analyzed to understand the electron emission characteristics.
5:Data Analysis Methods:
The simulation results show the electron interception rate of grid2 and the factors affecting electron emission.
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