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Chin. Phys. B, 2021, Vol. 30(11): 118502    DOI: 10.1088/1674-1056/abff1e
INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY Prev   Next  

Light-controlled pulsed x-ray tube with photocathode

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
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.
Keywords:  x-ray source      photocathode      x-ray modulation  
Received:  18 January 2021      Revised:  08 April 2021      Accepted manuscript online:  08 May 2021
PACS:  85.45.Bz (Vacuum microelectronic device characterization, design, and modeling)  
  85.60.Ha (Photomultipliers; phototubes and photocathodes)  
  98.70.Qy (X-ray sources; X-ray bursts)  
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).
Corresponding Authors:  Li-Zhi Sheng     E-mail:  lizhi_sheng@opt.ac.cn

Cite this article: 

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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