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We have successfully fabricated the reliable vacuum-sealed X-ray tube with carbon nanotube (CNT) emitters through a specially designed brazing process. The robust CNT emitters were also adopted for high-temperature endurance during the brazing process. The stable field emission current from the sealed X-ray tube indicated a good maintenance of vacuum level needed for the CNT field emitters. The stability...
We suggest a novel gate structure, Focusing-Functional Gate (FFG), having a focusing effect on the electron beams from the carbon nanotube (CNT) emitters for the miniature X-ray tubes. The FFG induced field emission from the CNT emitters and focused electron beams into the anode target without an additional focusing electrode, resulting in a small focal spot with little charging at the insulating...
We, for the first time, developed fully vacuum-sealed X-ray tubes with carbon nanotube field emitters. The specially designed brazing process has been adopted for the vacuum sealing of the X-ray tube. The fabricated two types of X-ray tubes showed a good operation with a high stability and long lifetime.
We have successfully operated the vacuum-sealed pentode X-ray tube with carbon nanotube (CNT) field emitters. Each component of the X-ray tube was sealed by a two-step brazing process in a vacuum furnace. The robust CNT emitter was specially developed for high-temperature endurance during the vacuum brazing process.
We have fabricated a smart triode X-ray tube based on carbon nanotube (CNT) emitters with a high tube current for the stationary breast tomosynthesis examination system. The X-ray tube was designed to have a focal spot of around 0.3 mm. The active-current driving method was applied to our X-ray device to enhance stability and uniformity of the CNT emitters. We have obtained successful X-ray images...
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