The emission characteristics of graphite nanospines (GNSs) encapsulated in an x-ray tube with a system for controlling electric field crowding (SCEFC) are investigated. GNSs encapsulated in an x-ray tube can be driven at an anode current (IA) of more than 1 mA. Further, IA can be controlled using the SCEFC. During the operation of the x-ray tube with GNSs and the SCEFC at the anode voltage of 12.5 kV and IA of 640 μA for 100 h, there was no degradation in IA. The noise current superimposed on IA was observed to be ±34.5 μA. It was reduced to ±1.62 μA by using the SCEFC. The authors also demonstrated radiography and x-ray fluorescence measurement as applications of x-ray tubes with GNSs and the SCEFC.
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Jyouzuka et al. (2010) studied this question.
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