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Light-controlled pulsed x-ray tube with photocathode
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作者 Hao Xuan Yong-An Liu +4 位作者 Peng-Fei Qiang Tong Su Xiang-Hui Yang li-zhi sheng Bao-sheng Zhao 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第11期650-655,共6页
Unstable mechanical structure,low energy efficiency,and cooling requirements limit the application of conventional x-ray tubes based on filament as cathode in several academic areas.In this paper,we demonstrate a ligh... Unstable mechanical structure,low energy efficiency,and cooling requirements limit the application of conventional x-ray tubes based on filament as cathode in several academic areas.In this paper,we demonstrate a light-controlled pulsed x-ray tube using multialkali cathode as electron generator.The photocathode active area of the light controlled x-ray tube is 13.2 cm^(2)(41 mm in diameter),which provides high photoelectron-emitting efficiency up to 0.288 mA/lm in 460-nm LED and 2.37-mA maximum tube current.Furthermore,the modulation ability from 1 kHz to 100 kHz of the x-ray tube is tested.The results suggest that the light-controlled pulsed x-ray tube has easy modulation and short x-ray pulse properties and is promising to be the next generation x-ray tube with wide applications in medical radiation therapy as well as the calibration for detectors and scintillators. 展开更多
关键词 x-ray source PHOTOCATHODE x-ray modulation
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