Computer simulation of knife-edge field emission cathode performance

One of the potential advantages of vacuum field emission arrays (FEA) is that the FEA can produce high frequency modulated electron beams at high current densities. A knife-edge field emission array (KEFEA) structure has been built. The KEFEA cathode array consists of many knife field emitters, each...

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Bibliographic Details
Main Authors: Zeng, B.Q., Yang, Z.H., Xie, K.J., Yang, C.F.
Format: Conference Proceeding
Language:English
Subjects:
Anodes
Capacitance
Cathodes
Current density
Electron beams
Elementary particle vacuum
Field emitter arrays
Optical modulation
Testing
Vacuum technology
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Summary:One of the potential advantages of vacuum field emission arrays (FEA) is that the FEA can produce high frequency modulated electron beams at high current densities. A knife-edge field emission array (KEFEA) structure has been built. The KEFEA cathode array consists of many knife field emitters, each with its own self-aligned surrounding gate. The initial tests of the KEFEA cathodes have shown a threshold bias voltage of less than 50 V. In this paper, the KEFEA emission performance has been studied by simulating a unit cell structure using the particle-in-cell simulation code MAGIC.
DOI:10.1109/ICIMW.2000.892943