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
Abstract 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.
Fund: 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), and the Foundation of State Key Laboratory of China (Grant No. SKLIPR2021).
Hao Xuan(宣浩), Yong-An Liu(刘永安), Peng-Fei Qiang(强鹏飞), Tong Su(苏桐), Xiang-Hui Yang(杨向辉), Li-Zhi Sheng(盛立志), and Bao-Sheng Zhao(赵宝升) Light-controlled pulsed x-ray tube with photocathode 2021 Chin. Phys. B 30 118502
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Photoemission of graded-doping GaN photocathode Fu Xiao-Qian(付小倩), Chang Ben-Kang(常本康), Wang Xiao-Hui(王晓晖), Li Biao(李飙), Du Yu-Jie(杜玉杰), and Zhang Jun-Ju(张俊举). Chin. Phys. B, 2011, 20(3): 037902.
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