Effect of slow wave structure length on microwave emission from a high-power backward-wave oscillator

2002 ◽  
Author(s):  
M. Yatsuzuka ◽  
Y. Sumitani ◽  
Y. Hashimoto ◽  
S. Nobuhara
Keyword(s):  
Slow Wave ◽  
High Power ◽  
Wave Structure ◽  
Slow Wave Structure ◽  
Microwave Emission ◽  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave

scholarly journals Simulation Investigations of High Power Overmoded Relativistic Backward Wave Oscillator with Trapezoidal Resonant Reflector

2021 ◽  
Vol 71 (03) ◽  
pp. 346-350
Author(s):  
V. Venkata Reddy ◽  
M.A. Ansari ◽  
M. Thottappan
Keyword(s):  
Output Power ◽  
Slow Wave ◽  
High Power ◽  
Wave Structure ◽  
Slow Wave Structure ◽  
Backward Wave Oscillator ◽  
Particle In Cell ◽  
Resonant Reflector ◽  
Wave Oscillator ◽  
Backward Wave

An S-band high power relativistic backward wave oscillator using a trapezoidal resonant reflector and overmoded slow-wave structure is demonstrated by finite difference time domain based Particle-In-Cell code. The trapezoidal resonant reflector and slow-wave structure are chosen to improve the RBWO power handing capability to gigawatt (GW). The Trapezoidal resonant reflector enhances the pre-modulation during electron beam propagation, thus increasing the generated RF signal overall efficiency and coherency. The particle-in-cell simulation generated an RF output power ~5.4 GW in TM01 mode at ~3.6 GHz in a 2.0 T magnetic field and developed a 13.5 kA current for a 1.2 MV DC cathode voltage. The power conversion efficiency is achieved as ~33 %. Further, the influence of different design parameters on frequency, RF output power, and efficiency are analysed through Particle-In-Cell simulations.

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