Curbing Charging Currents in Pulsed Field Emission by Prolonging Pulse Edges

	Curbing Charging Currents in Pulsed Field Emission by Prolonging Pulse Edges
	Geng-Min Zhang; Ying-Jie Xing; Wen-Sheng Zhou; Jin-Di Wei; Yun-Hui Li; Jin Yang
刊名	CHINESE PHYSICS LETTERS
	2018
文献子类	期刊论文
英文摘要	In field emission under a non-dc voltage, a displacement current is inevitable due to charging the cathode–anode condenser. Under an often-used square voltage pulse, in which the voltage rises from zero to a certain value abruptly, the charging current in the circuit is very large at the rising and falling edges. This large charging current makes measurement of the actual emissive current from the cathode difficult, constitutes a threat to the components in the circuit and causes attenuation of the emissive current within the pulse. To alleviate these drawbacks, trapezoid voltage pulses, whose rising edges are extended dramatically in comparison with square voltage pulses, are employed to extract the field emission. Under a trapezoid voltage pulse, the charging current is clearly lowered as expected. Furthermore, the heat generated by the charging current under the trapezoid voltage pulse is much smaller than that under the square voltage pulse. Hence the emissive current does not show any attenuation within the pulse. Finally, the average emissive currents are found to decrease with the repetition frequency of the pulses.
URL标识	查看原文
语种	英语
内容类型	期刊论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/14239]
专题	深圳先进技术研究院_医工所
推荐引用方式 GB/T 7714	Geng-Min Zhang,Ying-Jie Xing,Wen-Sheng Zhou,et al. Curbing Charging Currents in Pulsed Field Emission by Prolonging Pulse Edges[J]. CHINESE PHYSICS LETTERS,2018.
APA	Geng-Min Zhang,Ying-Jie Xing,Wen-Sheng Zhou,Jin-Di Wei,Yun-Hui Li,&Jin Yang.(2018).Curbing Charging Currents in Pulsed Field Emission by Prolonging Pulse Edges.CHINESE PHYSICS LETTERS.
MLA	Geng-Min Zhang,et al."Curbing Charging Currents in Pulsed Field Emission by Prolonging Pulse Edges".CHINESE PHYSICS LETTERS (2018).