Journal of Infrared and Millimeter Waves, Volume. 42, Issue 2, 208(2023)
Temperature uniformity and thermal deformation analysis of the cathode with radiation heating in the magnetron injection electron gun
Figures & Tables(14)
Fig. 1. The schematic view of electron gun and cathode emitter,(a) the structure of electron gun，(b) the structure of cathode emitter
Fig. 2. The maximum temperature of the emitter changing with heating power
Fig. 3. Temperature distribution of electron gun, cathode body and cathode emitter,(a) temperature distribution of electron gun, (b) temperature distribution of cathode body, (c) temperature distribution of cathode emitter
Fig. 5. Temperature difference on the cathode emitter surface with different heater parameters,(a) heater pitch, (b) heater winding radius, (c) heater position
Fig. 6. Thermal deformation distribution of electron gun and cathode emitter in the axial direction
Fig. 7. Thermal deformation distribution of electron gun and cathode emitter in the radial direction
Table 1. Parameters of the electron gun
View tableView in ArticleTable 1. Parameters of the electron gun
阴极体表面中心半径/mm 阴极体轴向宽度/mm 阴极电流发射密度/A·cm-2 阴极角度/（°） 横纵速度比 引导中心半径/mm 49 5 2.6 26 1.32 10.3
Table 2. Material parameters
View tableView in ArticleTable 2. Material parameters
热导率/W·m-1·K-1 热膨胀系数/
（
m·m-1·K-1） 泊松比 弹性模量/GPa 钼 159 6 0.3 351 钨 174 4.5 0.28 411 陶瓷 14.7 8.8 0.3 310 钽 54 6.5 0.35 186
Table 3. Temperature difference of cathode emitter varying with heater position
View tableView in ArticleTable 3. Temperature difference of cathode emitter varying with heater position
灯丝距底部陶瓷支撑结构距离/mm 阴极表面温差/℃ 阴极体温差/℃ 1.4 1.1 3.2 2.4 1.4 3.5 4.4 1.7 3.5 6.4 2.8 4.4
Table 4. Variation of electron beam parameters before and after electron gun deformation
View tableView in ArticleTable 4. Variation of electron beam parameters before and after electron gun deformation
引导中心半径/mm 横纵速度比 横向速度零散 形变前 10.34 1.3 4.2％ 形变后 10.42 1.46 4.8％
Table 5. Measured and simulated data
View tableView in ArticleTable 5. Measured and simulated data
输入电压/V 输入电流/A 实测温度/℃ 仿真温度/℃ 20.5 31 851 871 21.7 32 882 900 23.4 33.7 943 924 24.9 35 980 978
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Ming-Zhe YANG, Xiao-Xia WANG, Yu FAN, Ming-Feng MENG, Chen YANG, Cha GAO, Ji-Run LUO. Temperature uniformity and thermal deformation analysis of the cathode with radiation heating in the magnetron injection electron gun[J]. Journal of Infrared and Millimeter Waves, 2023, 42(2): 208
Paper Information
Category: Research Articles
Received: Jul. 26, 2022
Accepted: --
Published Online: Jul. 19, 2023
The Author Email: Xiao-Xia WANG (xxwang@mail.ie.ac.cn)
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