Abstract
A carbon nanotube (CNT) cold cathode with a side-gate electrode for a flat panel X-ray source was developed and basic characteristics of the CNT cathode with surface treatments were evaluated. The CNT cathode treated by KrF excimer laser irradiation with a high electric field pulse aging showed the best performance concerning long lifetime, while the CNT cathode treated by tape peeling method without a high electric field pulse aging showed the best performance concerning high anode current. Observed anode current at 4 kV is comparable with some of the commercially available X-ray tubes, suggesting that the CNT cathode with side-gate electrodes can be used for an electron source for a flat panel X-ray source.
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