To control the electron beam emitted from the carbon nanotube (CNT) cathode, four different electron chunnels are designed.
为了控制碳纳米管阴极发射电子束的形状，设计了4种电子通道来控制电子束轨迹。
The results demonstrate that the electron beams emitted from concave cathode are focused obviously.
试验结果表明，凹面阴极发射电子束会聚明显。
The results demonstrate that the electron beams emitted from concave cathode are focused obviously.
试验结果表明，凹面阴极发射电子束会聚明显。
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