Small-Sized Flat-Tip CNT Emitters for Miniaturized X-Ray Tubes

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Small tip-type CNT emitters with the diameter of 0.8 mm were fabricated for miniaturized X-ray tubes. The CNT emitters were prepared by dropping CNTs and silver nanoparticles on a flat surface of a W metal tip followed by annealing at 800 degrees C for 2 h under vacuum. The CNT emitters exhibit good field emission properties with the threshold electric field of 1.15 V/mu m and the field enhancement factor of 12,050. CNTs were well attached to a flat W tip surface without coating on the side plane of the tip, and thus beam divergence could be minimized. Consequently, a miniaturized X-ray tube with the inner diameter of 5 mm was successfully demonstrated using the tip-type CNT emitter.
Publisher
HINDAWI PUBLISHING CORPORATION
Issue Date
2012
Language
English
Article Type
Article
Keywords

FIELD-EMISSION PROPERTIES; CARBON NANOTUBES; ELECTRONIC BRACHYTHERAPY; PANEL DISPLAY; DEVICE; RADIOSURGERY; CATHODE; ARRAYS

Citation

JOURNAL OF NANOMATERIALS, pp.01 - 06

ISSN
1687-4110
DOI
10.1155/2012/854602
URI
http://hdl.handle.net/10203/102881
Appears in Collection
NE-Journal Papers(저널논문)
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