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Author Chen, Daokun ♦ Song, Xiaomeng ♦ Zhang, Zhipeng ♦ Chen, Jun ♦ Li, Ziping ♦ She, Juncong ♦ Deng, Shaozhi ♦ Xu, Ningsheng
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ANODES ♦ BREMSSTRAHLUNG ♦ DISTRIBUTION ♦ ELECTRON EMISSION ♦ GLASS ♦ NANOWIRES ♦ SIGNALS ♦ SILICA ♦ SPATIAL RESOLUTION ♦ SUBSTRATES ♦ THIN FILMS ♦ TRANSMISSION ♦ X RADIATION ♦ X-RAY SOURCES ♦ ZINC OXIDES
Abstract A transmission type flat-panel X-ray source in diode structure was fabricated. Large-scale patterned ZnO nanowires grown on a glass substrate by thermal oxidation were utilized as field emitters, and tungsten thin film coated on silica glass was used as the transmission anode. Uniform distribution of X-ray generation was achieved, which benefited from the uniform electron emission from ZnO nanowires. Self-ballasting effect induced by the intrinsic resistance of ZnO nanowire and decreasing of screening effect caused by patterned emitters account for the uniform emission. Characteristic X-ray peaks of W-L lines and bremsstrahlung X-rays have been observed under anode voltages at a range of 18–20 kV, the latter of which were the dominant X-ray signals. High-resolution X-ray images with spatial resolution less than 25 μm were obtained by the flat-panel X-ray source. The high resolution was attributed to the small divergence angle of the emitted X-rays from the transmission X-ray source.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-12-14
Publisher Place United States
Journal Applied Physics Letters
Volume Number 107
Issue Number 24


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