Fully vacuum-sealed addressable nanowire cold cathode flat-panel x-ray source

Addressable flat-panel x-ray source has important applications in next-generation low-dose x-ray imaging technology. In this study, a fully vacuum-sealed addressable flat-panel x-ray source has been fabricated using a ZnO nanowire cold cathode. The x-ray source was formed by assembling gated ZnO nan...

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Veröffentlicht in:Applied physics letters 2021-08, Vol.119 (5)
Hauptverfasser: Cao, Xiuqing, Zhang, Guofu, Zhao, Yangyang, Xu, Yuan, She, Juncong, Deng, Shaozhi, Xu, Ningsheng, Chen, Jun
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Sprache:eng
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Zusammenfassung:Addressable flat-panel x-ray source has important applications in next-generation low-dose x-ray imaging technology. In this study, a fully vacuum-sealed addressable flat-panel x-ray source has been fabricated using a ZnO nanowire cold cathode. The x-ray source was formed by assembling gated ZnO nanowire field emitters and a molybdenum thin film transmission anode target. Pulsed and addressable x-ray emission was achieved by applying voltages to the extraction gate. Radiation dose rates of 235 nGy/s were achieved when the device was operated at 21 kV anode voltage and 140 V gate voltage. Projection x-ray images of objects were obtained by the flat-panel x-ray source. Our results demonstrated the feasibility of a fully addressable cold cathode flat-panel x-ray source.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0061332