Title :
Ballasted carbon nanotube array based X-ray tube
Author :
Sun, Yonghai ; Yeow, John T W ; Jaffray, David A.
Author_Institution :
Dept. of Syst. Design Eng., Univ. of Waterloo, Waterloo, ON, Canada
Abstract :
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.
Keywords :
X-ray tubes; carbon nanotubes; cathodes; X-ray tube; average emission current; ballast resistor layer; ballasted carbon nanotube array; diode structure X-ray; fabrication process; field emission cathode; field emitters; low-density vertically aligned CNT array; maximum emission current; reliability; safety operation; stability; Arrays; Carbon nanotubes; Cathodes; Electron tubes; Electronic ballasts; Resistors; X-ray imaging; Ballast Resistor; Carbon Nanotube; Field Emission; X-ray;
Conference_Titel :
Nanotechnology (IEEE-NANO), 2012 12th IEEE Conference on
Conference_Location :
Birmingham
Print_ISBN :
978-1-4673-2198-3
DOI :
10.1109/NANO.2012.6321904
