Researching | Optimization of Electron Beams for End-Window X-Ray Tubes with High Power

Acta Optica Sinica, Volume. 43, Issue 22, 2234001(2023)

Optimization of Electron Beams for End-Window X-Ray Tubes with High Power

Silin Wang^1,2, Junbiao Liu^1,2、*, Dazheng Wang^1、**, Pengfei Wang¹, and Li Han^1,2

Author Affiliations

¹Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China

²University of Chinese Academy of Sciences, Beijing 100049, China

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Figures&Tables (14)

References (13)

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Figures & Tables(14)

Fig. 1. Schematic of part X-ray tube structure

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Fig. 2. Dimension sketch of simplified geometric model

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Fig. 3. Potential distribution near the filament

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Fig. 4. Beam current calculation result for different filament voltages

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Fig. 5. Beam current calculation result for different filament heights

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Fig. 6. Schematic of experimental principle

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Fig. 7. Change of beam current with joule heat power

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Fig. 8. Filament resistance calculation and measurement

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Fig. 9. Relationship between temperature and joule thermal power

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Fig. 10. Relationship between beam current and voltage when filament current is 12 A

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Fig. 11. Effect of different filament potentials on beam current

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Table 1. Key initial parameters of geometric model
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Table 1. Key initial parameters of geometric model
Parameter Value Parameter Value
h_c /mm $17.02$ h_a /mm $8.52$
D_c /mm $44.60$ D_a /mm $18.00$
d_c /mm $0.40$ θ /（°） $35$

Table 2. Result of thermal electron emission
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Table 2. Result of thermal electron emission
Parameter Value Parameter Value
Emission current /A 10.74 Inner diameter of the beam spot /mm $10.10$
Probability /% 0.30 Outer diameter of the beam spot /mm $15.00$
Target current /mA 32.65 Kinetic energy / $k e V$ $90.30$

Table 3. Result of space charge limit emission
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Table 3. Result of space charge limit emission
Parameter Value Parameter Value
Emission current /mA 18.05 Inner diameter of the beam spot /mm $13.00$
Probability /% 99.80 Outer diameter of the beam spot /mm $14.20$
Target current /mA $18.01$ Kinetic energy / $k e V$ $84.20$

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Silin Wang, Junbiao Liu, Dazheng Wang, Pengfei Wang, Li Han. Optimization of Electron Beams for End-Window X-Ray Tubes with High Power[J]. Acta Optica Sinica, 2023, 43(22): 2234001

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Paper Information

Category: X-Ray Optics

Received: May. 17, 2023

Accepted: Jun. 26, 2023

Published Online: Nov. 20, 2023

The Author Email: Liu Junbiao (liujb@mail.iee.ac.cn), Wang Dazheng (dzwang@mail.iee.ac.cn)

DOI:10.3788/AOS231000

Topics

laser devices and laser physics

Lasers and Laser Optics

laser manufacturing

Instrumentation, Measurement and Metrology