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- W1567623437 abstract "Traveling wave tubes (TWTs), when used in satellite communication, have to work for several years without deterioration of performance and hence the TWTs have to be highly efficient and reliable. However, the performance of the TWT in a satellite deteriorate with time, one of the main reasons being poisoning of cathode due to ion effect. In a TWT, during operation at higher duty and/or CW mode, the residual gases get ionized by the electron beam and add to the ion density in the beam with time. The enhanced ion density neutralizes the electron space charge potential within the beam and hence deterioration of the power output and efficiency of the TWT and also the ions may drain to the cathode which may damage/poison the cathode and hence degradation of life of the tube. However, these problems are minimized by adding an additional ion barrier/control anode in the electron gun. It has been observed that the control anode potential plays an important role in enhancement of the performance of a TWT. Since the control anode potential may be varied from a anode voltage loop regulation circuit to maintain required beam current, the performance of the TWT will be enhanced with time. In this paper, authors have shown experimentally, how the control anode potential affects the performance of a helix TWT, operating in CW mode. In a satellite communication TWT, the bandwidth may be narrow but the TWTs have to be very highly efficient and highly reliable." @default.
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- W1567623437 date "2006-08-08" @default.
- W1567623437 modified "2023-09-27" @default.
- W1567623437 title "On-Board Performance Enhancement of A Satellite Communication TWT" @default.
- W1567623437 doi "https://doi.org/10.1109/ivelec.2006.1666234" @default.
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