کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8044883 | 1518945 | 2016 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High-current, pulsed electron beam sources with SiC nanowire cathodes
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: High-current, pulsed electron beam sources with SiC nanowire cathodes High-current, pulsed electron beam sources with SiC nanowire cathodes](/preview/png/8044883.png)
چکیده انگلیسی
High-current electron beam cathodes based on SiC nanowires have been successfully fabricated. The emission properties of the cathodes were performed in a single high-voltage pulse generator (450Â kV, 120Â ns) and a repetitive one (300Â kV, 6Â ns, 100Â Hz), respectively. In a single-pulse regime, the high intensity emission from the cathode was obtained and the highest emission current density reached about 1.17Â kA/cm2 at an electric field of 90Â kV/cm. Emission optical images proved that the formation of plasma on the cathode surface induces the enhancement of electron emission, suggesting the production mechanism of the high current is an explosive electron emission. Under repetition rate mode, typical results of discharge waveforms of 100Â Hz are presented, and the pulse-to-pulse instability of the cathode current was below 3.43%. The pressure boost during the pulse series was below 1.4Â ÃÂ 10â2Â Pa. The SiC nanowire cathodes appear to be suitable for high-power microwave source applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 125, March 2016, Pages 81-84
Journal: Vacuum - Volume 125, March 2016, Pages 81-84
نویسندگان
Tao Xun, Xue-long Zhao, Gong-yi Li, Tian-jiao Hu, Jie Yang, Han-wu Yang, Jian-de Zhang,