DocumentCode :
48991
Title :
Design and Simulation of Lossy Interaction Structure for Ka-Band Gyro-TWT
Author :
Alaria, M.K. ; Ghosh, Soumya K. ; Choyal, Y. ; Sinha, Arun Kumar ; Jain, P.K.
Author_Institution :
Microwave Tubes Area, CSIR-Central Electronics Engineering Research Institute, Pilani, India
Volume :
41
Issue :
8
fYear :
2013
fDate :
Aug. 2013
Firstpage :
2264
Lastpage :
2268
Abstract :
In this paper, beam-wave interaction analysis in a Ka-band periodically ceramic loaded gyrotron traveling-wave tube (gyro-TWT) amplifier is investigated using particle-in-cell (PIC) simulation. The simulations predict that the interaction structure can produce more than 80-kW output power, 50-dB saturated gain, and 3-dB bandwidth is 2.56 GHz for 65 kV and 5-A electron beam with velocity ratio (\\alpha ) of 1.2. The dispersion and interaction impedance characteristics of the ceramic-loaded gyro-TWT amplifier are also determined using 3-D simulator CST-microwave studio. This paper describes the design and simulation of a high performance 35-GHz {\\rm TE}_{01} mode gyro-TWT that applies the same technique of employing a periodic dielectric loaded interaction structure to achieve stability and wide bandwidth. The stability of this gyro-amplifier is excellent and demonstrates that the ceramic loading is highly effective for suppressing the spurious oscillations in gyro-TWT.
Keywords :
Dielectric losses; Dispersion; Gain; Gyrotrons; Load modeling; Loaded waveguides; Beam wave interaction; dispersion; gyroton traveling wave tube (gyro-TWT); interaction impedance;
fLanguage :
English
Journal_Title :
Plasma Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-3813
Type :
jour
DOI :
10.1109/TPS.2013.2258685
Filename :
6514087
Link To Document :
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