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Improvement on cold carbon field-electron emitter for commercial x-ray tube

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8 Author(s)
Lv, Q.N. ; Beijing Ritchie’s Time Hi-Tech. Development Co. Ltd., Beijing 100080, People’s Republic of China ; Wang, D.A. ; Li, T.X. ; Ju, Z.M.
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A high-temperature-resistant smooth carbon field-electron emitter (SCFE) was proposed for replacing an original high-temperature-resistant carbon field-electron emitter. We compared their electron emission, processes, post-treatment technologies, and life. A comparison shows that the new SCFE has qualities. The SCFE showed a smoother surface, with bulk tightness, improved electron emission properties, decreased emitter thickness, and the contact between electrodes is better than ever. The electron emission area has been concentrated on a thinner edge, and we obtained high precision for the tube’s electrode construction. Initial experiments indicated that those x-ray tubes with the SCFE maintained their properties from August 2006 up to the present.

Published in:

Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures  (Volume:26 ,  Issue: 2 )