Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-23T13:37:27.696Z Has data issue: false hasContentIssue false
  • English
  • Français

Improvement of Emission Current by Using CNT Based X-ray Tube

Published online by Cambridge University Press:  01 February 2011

Haeyoung Choi  and
Jong Uk Kim
Haeyoung Choi
Affiliation:
[email protected], Korea Electrotechnology Research Institute, Applied Imaging Research Group, Gyeonggi-Technopark 4F, 1271-11, Sa-1dong, Ansan, 426-901, Korea, Republic of, +82-31-500-4822, +82-31-500-4830
Jong Uk Kim
Affiliation:
[email protected], Korea Electrotechnology Research Institute, Applied Imaging Research Group, Gyeonggi-Technopark 4F, 1271-11, Sa-1dong, Ansan, 426-901, Korea, Republic of
Get access

Abstract

Studies on the electronic structure of carbon nanotube (CNT) are of much importance because of its efficient utilization in electronic vacuum devices [1]. These CNTs have many applications such as field emission display (FED), LCD backlight units, microwave amplifiers, lighting lamps, x-ray sources and so on. One of these applications is the electron emitter for x-ray source. In order to obtain x-ray images of relatively hard instruments or components such as PCB board or machine tools, high quantity of x-ray current is generally required. In this study, we report that the current density of x-ray source can be greatly enhanced by using the CNT emitter as a cathode. In general, the emission current of CNT emitter is very sensitive to gap distance between CNT emitter and grid metal mesh. In addition, the emission current is appeared to be different with respect to the kinds of metal meshes and their sizes employed in the measurement. Extensive results of these were reported in our recent works [2]. For example, as the distance between CNT emitter and grid metal mesh was getting shorter, the current density of the triode was getting larger. Detailed parameters and corresponding results were presented and some preliminary x-ray images were obtained and discussed in this study.

Keywords

field emissionchemical vapor deposition (CVD) (deposition)electrical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 963: Symposium Q – Nanowires and Carbon Nanotubes – Science and Applications , 2006 , 0963-Q10-50
Copyright
Copyright © Materials Research Society 2007

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Tanaka, K., Yamabe, T., Fukui, K., the Science and Technology of Carbon Nanotube, 1999 Ed., p. 40.Google Scholar
2. Choi, H. Y., Chang, W. S., Kim, H. S., Park, Y. H., Kim, J. U., Physics Letters A 357, 36 (2006).Google Scholar
3. Carbon Nanotubes: Synthesis, Structure, Properties, and Applications, edited by Dresselhaus, M. S., Dresselhaus, G., and Avouris, P. (Springer, Heidelberg 2001).Google Scholar
4. Baughman, R. H., Zakhidov, A. A., and Heer, W. A. D., Science 297, 787 (2002).Google Scholar
5. Oh, S. J., Zhang, J. and Cheng, Y., Shimoda, H., Zhou, O., Applied Physics Letters 84, 3738 (2004).Google Scholar
6. Busong, S. C., Radiologic Science for Technologist (Mosby, St. Louis, 1977).Google Scholar
7. Yue, G. Z., Qui, Q. and Gao, Bo, Cheng, Y., Zhang, J., Shimoda, H., Chang, S., Lu, J. P. and Zhou, O., Applied Physics Letters 81, 355 (2002).Google Scholar
8. Chang, Won Suk, Choi, Hae Young and Kim, Jong Uk, Japanese Journal of Applied Physics 45 7175(2006).Google Scholar