Title :
Characterization of electron emitters for miniature X-ray sources
Author :
Bust, H.H. ; Chen, J.M. ; Shen, Z. ; Janson, K. ; Rizkowski, S. ; Matey, J. ; Lanzillotto, A.
Author_Institution :
Sarnoff Corp., Princeton, NJ, USA
Abstract :
Single tip tungsten emitters, nanocrystalline carbon (NCG) emitters, thoriated tungsten thermionic filament emitters, micromachined polycrystalline silicon thermionic emitters, and gated silicon field emitter arrays have been investigated as potential electron sources for miniature X-ray devices. The emission sources were characterized in a demountable 3 mm diameter tube using a 45° cone angle, 1 mm diameter tungsten anode. X-ray characterization was performed in a custom-built shielded system surrounding the demountable tube. With this system, it is possible to measure lateral, distal, and rotational X-ray spectra. From a power consumption point of view, which is important for cardiac artery treatment to avoid heating of the blood, the thermionic emitters are less desirable
Keywords :
X-ray spectroscopy; X-ray tubes; cardiology; electron field emission; radiation therapy; silicon; thermionic electron emission; tungsten; vacuum microelectronics; 1 mm; 15 to 20 kV; 20 Gy; 3 mm; C; Si; Th-W; W; X-ray characterization; cardiac artery treatment; cone angle; custom-built shielded system; demountable 3 mm diameter tube; distal X-ray spectra; electron emitters; gated silicon field emitter arrays; lateral X-ray spectra; micromachined polycrystalline silicon thermionic emitters; miniature X-ray sources; nanocrystalline carbon emitters; power consumption; rotational X-ray spectra; single tip tungsten emitters; therapeutic dose; thoriated tungsten thermionic filament emitters; tungsten anode; Anodes; Carbon dioxide; Electron guns; Electron sources; Energy consumption; Field emitter arrays; Nanoscale devices; Rotation measurement; Silicon; Tungsten;
Conference_Titel :
Vacuum Microelectronics Conference, 2001. IVMC 2001. Proceedings of the 14th International
Conference_Location :
Davis, CA
Print_ISBN :
0-7803-7197-6
DOI :
10.1109/IVMC.2001.939627
