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Physics of Plasmas : High intensity, plasma-induced emission from large area ZnO nanorod array cathodes

By Qingliang Liao, Ya Yang, Liansheng Xia, Junjie Qi, Yue Zhang et al

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Book Id: WPLBN0002169668
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 25 November 2008

Title: Physics of Plasmas : High intensity, plasma-induced emission from large area ZnO nanorod array cathodes  
Author: Qingliang Liao, Ya Yang, Liansheng Xia, Junjie Qi, Yue Zhang et al
Volume: Issue : November 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Physics of Plasmas Collection
Historic
Publication Date:
Publisher: American Institute of Physics

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Ya Yang, Liansheng Xia, Junjie Qi, Yue Zhang Et A, Q. L. (n.d.). Physics of Plasmas : High intensity, plasma-induced emission from large area ZnO nanorod array cathodes. Retrieved from http://hawaiilibrary.net/


Description
Description: High intensity electron emission cathodes based on a well-aligned ZnO nanorod array were fabricated. An investigation of the properties of the plasma and the electron beams produced by ZnO nanorod array cathodes was presented. Intense current electron beams were obtained from the cathodes. At an electric field of 7–8 V/μm and pulse duration of ∼ 100 ns, the highest emission current density reached 76–91 A/cm2. The production mechanism of the electron beams was the plasma-induced emission. The morphology and structure of the ZnO nanorod after the application of the accelerating pulses were characterized. The plasma expanded at a velocity of about 10.7 cm/μs during the pulse interval. Whether the emission currents are high or low, the plasma on the cathode surface were always distributed uniformly. The ZnO nanorod array cathodes are expected to be applied to high power vacuum electronic devices as electron beam sources.

 

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