A double-sided radiating flat-panel X-ray source using ZnO nanowire field emitters

摘要

Abstract A double-sided radiating flat-panel X-ray source device has been developed. The device has a diode configuration composed of an anode target of a tungsten thin film and field-emitter arrays of ZnO nanowires prepared on glass substrates. The X-ray radiation comes from both transmission and reflection of X-rays induced by electron bombardment. When operated at 24?kV with an anode current of 3.16?mA, radiation dose rates of ～200?mGy/min and ～210?mGy/min were recorded positioning at 4?cm away from the front and back sides of the vacuum-sealed flat-panel X-ray source, respectively. Clear X-ray images with high contrast were taken by the radiation from both sides of the device. The reported device has great potential in making compact X-ray radiography and irradiation systems. Highlights ? A vacuum-sealed double-sided radiating flat-panel X-ray source device using ZnO nanowire field emitters. ? Good field emission properties from ZnO nanowires and similar X-ray radiation from both sides of the device. ? Potential applications of the device in compact and portable X-ray radiography and irradiation systems. ]]>