Starting energy and current for a large diameter finite length backward wave oscillator operated at the fundamental mode

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Title: Starting energy and current for a large diameter finite length backward wave oscillator operated at the fundamental mode
Author: Minami, K.; Ogura, K.; Aiba, Y.; Amin, M.; Zheng, X.; Watanabe, T.; Carmel, Y.; Destler, William; Granatstein, V.
Abstract: We study the starting conditions for a large diameter (diameter/wavelength = 4.8) finite length backward wave oscillator designed for 24-GHz operation at the fundamental T M o l mode. This geometry is very promising for high power handling capability. We analyze two separate threshold conditions. First, finite length effects give rise to a threshold in electron beam energy below which oscillations cannot be sustained at any beam current. The second is the more familiar current threshold known as a start current. It is also found that the growth rate for the fundamental mode can be much larger than those of other higher order modes thus leading to coherent operation of large diameter source free from mode competition.
Description: This article can also be found on the publishers website: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=376576
Record URI: http://hdl.handle.net/1850/9483
Date: 1995-04

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