Influence of temperature effect of field emission on explosive electron emission in microwave tube

Zuo Yinghong; Wang Jianguo; Fan Ruyu; Zhu Jinhui; Niu Shengli

doi:10.3788/HPLPB20132505.1236

Volume 25 Issue 05

Mar. 2013

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(05): 1236-1240

Yu Bo, Su Ming, Liu ShenYe, et al. Simulation on spatial resolution of scintillator arrays based on neutron penumbral imaging system[J]. High Power Laser and Particle Beams, 2012, 24: 1826-1830. doi: 10.3788/HPLPB20122408.1826

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Zuo Yinghong, Wang Jianguo, Fan Ruyu, et al. Influence of temperature effect of field emission on explosive electron emission in microwave tube[J]. High Power Laser and Particle Beams, 2013, 25: 1236-1240. doi: 10.3788/HPLPB20132505.1236

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Influence of temperature effect of field emission on explosive electron emission in microwave tube

doi: 10.3788/HPLPB20132505.1236

1.
Northwest Institute of Nuclear Technology,P.O.Box 69-12,Xi’an 710024,China;
2.
Department of Engineering Physics,Tsinghua University,Beijing 100084,China;
3.
School of Electronic and Information Engineering,Xi’an Jiaotong University,Xi’an 710049,China

Received Date: 2012-08-22
Rev Recd Date: 2012-11-07
Publish Date: 2013-03-12

Abstract

Abstract

The paper drew a comparison between the Fowler-Nordheim (FN) field emission current density which is applicable at low temperature and the general integral expression for field emission current density. A slender cylindrical microprotrusion model was adopted, two main factors－joule heating and heat conduction were both taken into account, and the temperature distribution in microprotrusion and the time-dependence of temperature at different points on microprotrusion were obtained using the code developed by ourselves. The results show that it is necessary to consider the influence of temperature effect of field emission on explosive electron emission. The temperature in microprotrusion increases nonlinearly with time when the temperature effect is included, and the increasing rate of the temperature grows more and more quickly. At low microwave electric field, the time delay of explosive electron emission will be shortened if the FN current density of electron emission is used instead of the general integral expression which can include the temperature effect of field emission; the temperature effect has little influence on time delay of explosive electron emission at high microwave electric field.
- field emission,
- temperature effect,
- explosive electron emission,
- pulse shortening,
- microprotrusion,
- microwave tube

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