Light-controlled pulsed x-ray tube with photocathode  

作　　者：Hao Xuan Yong-An Liu Peng-Fei Qiang Tong Su Xiang-Hui Yang Li-Zhi Sheng Bao-Sheng Zhao 宣浩;刘永安;强鹏飞;苏桐;杨向辉;盛立志;赵宝升(State Key Laboratory of Transient Optics and Photonics,Xi’an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences CAS,Xi’an 710119,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]State Key Laboratory of Transient Optics and Photonics,Xi’an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences (CAS),Xi’an 710119,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Physics B》2021年第11期650-655,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.61901470 and U1931138);the Strategic Pioneer Program on Space Science,Chinese Academy of Sciences(Grant No.XDA15020501-04);the CAS“Light of West China”Program(Grant No.XAB2018A07);the Foundation of State Key Laboratory of China(Grant No.SKLIPR2021).

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 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.

关 键 词：x-ray source PHOTOCATHODE x-ray modulation 

分 类 号：TN14[电子电信—物理电子学]