Abstract
The arcing phenomenon is easy produced for high power coupled cavity traveling wave tube (CCTWT) in MW/MMW because of higher operating voltage and electric field in electronic gun region of tube. Pre-breakdown phenomenon before arcing and the reasons of leading arcing are analyzed. The effects of cathode performance for arcing in the tube are emphatically discussed. Some approaches for reducing the arcing are proposed. It is shown that arcing phenomenon in CCTWT is effectively suppressed.
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