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Ballasted carbon nanotube array based X-ray tube

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3 Author(s)
Yonghai Sun ; Dept. of Syst. Design Eng., Univ. of Waterloo, Waterloo, ON, Canada ; Yeow, J.T.W. ; Jaffray, D.A.

Ballast resistor under layer can improve reliability and stability of field emission cathode. But it has not been used in carbon nanotube based field emitters. In this article, we introduce a fabrication process of a low-density vertically aligned CNT array with a ballast resistor layer. Its average emission current is ~0.9uA /CNT, close to the suggested maximum emission current of safety operation. Furthermore, a diode structure X-ray with this cathode is also demonstrated.

Published in:

Nanotechnology (IEEE-NANO), 2012 12th IEEE Conference on

Date of Conference:

20-23 Aug. 2012