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Investigation of the Poynting flux ratio in the helix traveling wave tube | ||
Journal of Theoretical and Applied Physics | ||
مقاله 3، دوره 16، شماره 1، خرداد 2022، صفحه 1-6 اصل مقاله (385.18 K) | ||
نوع مقاله: Scientific Research Manuscript | ||
شناسه دیجیتال (DOI): 10.30495/jtap.162203 | ||
نویسندگان | ||
Shahrooz Saviz 1؛ Mona Mehranfar2؛ Davoud Dorranian 2 | ||
1Daneshgah Blvd, Simon Bulivar Blvd | ||
2Plasma Physics Research Centre, Science and Research Branch, Islamic Azad University, Tehran, Iran | ||
چکیده | ||
The study deals with amplification of a propagating slow wave interacting with an annular hollow electron beam in a helix slow wave structure (SWS). The role of thermal plasma density in a ratio of the axial pointing flux in the plasma region is also investigated. This ratio is small for lower plasma densities. The effects of the variations of the hollow electron beam velocity on the normalized growth rate and the poynting flux ratio at the hybrid mode frequency are presented. The maximum gain is obtained in the frequency of hybrid mode and the poynting flux ratio reaches its maximum value at the hybrid mode frequency. Also is analyzed the trend of changes for the normalized growth rate for a different beam velocities. The results show that for all beam velocities the maximum growth rate is for hybrid mode frequencies. The numerical method used in this paper is complex transcendental. | ||
کلیدواژهها | ||
Electron beam؛ gain؛ plasma | ||
آمار تعداد مشاهده مقاله: 113 تعداد دریافت فایل اصل مقاله: 99 |