Construction of a Ultrananocrystalline Diamond Based Cold Cathode Arrays for a Flat-Panel X-Ray Source
A novel cold cathode field emission array (FEA) X-ray source based on ultra-nanocrystalline diamond (UNCD) field emitters is being constructed as an alternative for detection of obscured objects and material. Depending on the geometry of the given situation the flat-panel X-ray source could be used in tomography, radiography, or tomosynthesis. Furthermore, the unit could be used as a portable X-ray scanner or an integral part of an existing detection system. UNCD field emitters show great field emission output and can be deposited over large areas as the case with carbon nanotube "forest" (CNT) cathodes. Furthermore, UNCDs have better mechanical and thermal properties as compared to CNT tips which further extend the lifetime of UNCD based FEA. This work includes the first generation of the UNCD based FEA prototype which is being manufactured at the Center for Nanoscale Materials within Argonne National Laboratory with standard microfabrication techniques. The prototype is a 3x3 pixel FEA, with a pixel pitch of 500 ?m, where each pixel is individually controllable.
E. J. Grant et al., "Construction of a Ultrananocrystalline Diamond Based Cold Cathode Arrays for a Flat-Panel X-Ray Source," Proceedings of SPIE - The International Society for Optical Engineering, vol. 8709, SPIE, Jan 2013.
The definitive version is available at https://doi.org/10.1117/12.2015846
Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XVIII
Mining and Nuclear Engineering
Defense Advanced Research Projects Agency
Keywords and Phrases
Field Emission; Flat-Panel X-Ray Source; Ultra-Nanocrystalline Diamonds (UNCD)
Article - Conference proceedings
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