中国物理B ›› 2021, Vol. 30 ›› Issue (11): 118502-118502.doi: 10.1088/1674-1056/abff1e
Hao Xuan(宣浩)1,2, Yong-An Liu(刘永安)1, Peng-Fei Qiang(强鹏飞)1, Tong Su(苏桐)1, Xiang-Hui Yang(杨向辉)1, Li-Zhi Sheng(盛立志)1,†, and Bao-Sheng Zhao(赵宝升)1
Hao Xuan(宣浩)1,2, Yong-An Liu(刘永安)1, Peng-Fei Qiang(强鹏飞)1, Tong Su(苏桐)1, Xiang-Hui Yang(杨向辉)1, Li-Zhi Sheng(盛立志)1,†, and Bao-Sheng Zhao(赵宝升)1
摘要: 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 cm2 (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.
中图分类号: (Vacuum microelectronic device characterization, design, and modeling)