By a News Reporter-Staff News Editor at Science Letter -- A new study on Fullerenes is now available. According to news reporting from Guangdong, People's Republic of China, by NewsRx journalists, research stated, "In order to develop millimeter wave electric vacuum radiation source devices with field emission cold cathodes, the electron-optical system using a large area carbon nanotube cold cathode (CNCC) was investigated, which can generate an electron beam with large current and high current density. By adding a mesh grid on the cathode surface of a Pierce electron gun, problems of the electron bunching and high electric field applied to the CNCC surface have been solved."
The news correspondents obtained a quote from the research from Sun Yat-Sen University, "Based on the experimental results of a CNCC, the field emission model was built, by using PIC simulation software, to simulate the Pierce electron-optical system. The effect of the mesh grid on the electron beam has been analyzed. And the influence of the anode voltage and the axial magnetic field for the electron beam radius has been researched. The simulation results of the electron-optical system showed that when the area of cathode is 3.03 cm(2), an electron beam with 210 mA at 60 kV can be produced."
According to the news reporters, the research concluded: "The current density is 6.7 A/cm(2) and the maximum radius of the electron beam is 1 mm."
For more information on this research see: A Pierce electron gun based on carbon nanotube cold cathodes. Journal of Infrared and Millimeter Waves, 2013;32(5):400-403,430. Journal of Infrared and Millimeter Waves can be contacted at: Science Press, 16 Donghuangchenggen North St, Beijing 100717, Peoples R China (see also Fullerenes).
Our news journalists report that additional information may be obtained by contacting L.M. Sun, Sun Yat Sen UniversityState Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, People's Republic of China. Additional authors for this research include X.S. Yuan, Y. Zhang, X.Y. Li, H. Yang and Y. Yan.
Keywords for this news article include: Asia, Guangdong, Fullerenes, Carbon Nanotubes, People's Republic of China
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