中国物理B ›› 2021, Vol. 30 ›› Issue (11): 118502-118502.doi: 10.1088/1674-1056/abff1e

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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. 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
  • 收稿日期:2021-01-18 修回日期:2021-04-08 接受日期:2021-05-08 出版日期:2021-10-13 发布日期:2021-11-03
  • 通讯作者: Li-Zhi Sheng E-mail:lizhi_sheng@opt.ac.cn
  • 基金资助:
    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).

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. 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
  • Received:2021-01-18 Revised:2021-04-08 Accepted:2021-05-08 Online:2021-10-13 Published:2021-11-03
  • Contact: Li-Zhi Sheng E-mail:lizhi_sheng@opt.ac.cn
  • Supported by:
    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).

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.

关键词: x-ray source, photocathode, x-ray modulation

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.

Key words: x-ray source, photocathode, x-ray modulation

中图分类号:  (Vacuum microelectronic device characterization, design, and modeling)

  • 85.45.Bz
85.60.Ha (Photomultipliers; phototubes and photocathodes) 98.70.Qy (X-ray sources; X-ray bursts)