Title :
A carbon nanotube field emitter formed on W-wire with high current density for X-ray source
Author :
Jun-Tae Kang ; Jae-Woo Kim ; Jin-Woo Jeong ; Hyeong-Rag Lee ; Yoon-Ho Song
Author_Institution :
Electron. & Telecommun. Res. Inst., Daejeon, South Korea
Abstract :
Field emission micro-focus X-ray source based on carbon nanotube (CNT) has attractive features for biomedical or clinical imaging. X-ray sources for micro-focus and/or miniature tube types require a mini-sized, high-density emission current in the order of 102~103 mA/cm2. We have previously reported that the optimized paste composition with a nano-scale metal filler enhanced adhesion between CNT emitter and cathode electrode at low temperature. In this study, a CNT-on-Tip cathode, having CNT emitter on a tungsten (W) wire of 100 μm in diameter, was developed in order to increase emission current density.
Keywords :
adhesion; carbon nanotubes; cathodes; current density; electron field emission; nanofabrication; tungsten; wires; C; W; biomedical imaging; carbon nanotube field emitter; cathode electrode; clinical imaging; field emission microfocus X-ray source; high-density emission current; miniature tube type; nanoscale metal filler enhanced adhesion; optimized paste composition; size 100 mum; tungsten wire; Three dimensional displays;
Conference_Titel :
Vacuum Electron Sources Conference and Nanocarbon (IVESC), 2010 8th International
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-6645-0
DOI :
10.1109/IVESC.2010.5644316
