Improved power capacity in a high efficiency klystron-like relativistic backward wave oscillator by distributed energy extraction

2013 ◽  
Vol 114 (21) ◽  
pp. 213301 ◽  
Author(s):  
Renzhen Xiao ◽  
Changhua Chen ◽  
Yibing Cao ◽  
Jun Sun
Keyword(s):  
High Efficiency ◽  
Energy Extraction ◽  
Distributed Energy ◽  
Power Capacity ◽  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave

scholarly journals Design and efficient operation of a coaxial RBWO

2013 ◽  
Vol 31 (2) ◽  
pp. 321-331 ◽  
Author(s):  
Y. Teng ◽  
C.H. Chen ◽  
H. Shao ◽  
J. Sun ◽  
Z.M. Song ◽  
...  
Keyword(s):  
Electron Beam ◽  
Slow Wave ◽  
Wave Structure ◽  
Slow Wave Structure ◽  
Power Capacity ◽  
Efficient Operation ◽  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave ◽  
Output Efficiency

AbstractCoaxial relativistic backward wave oscillator with the rippled inner conductor not only increases the output efficiency but also results in the serious phenomenon of pulse shortening in experiments. Our research indicates that the two main mechanisms leading to the pulse shortening are the electron beam interruption and combining effects of the explosive field electron emission and the secondary electron multipactor on the surface of the slow-wave structure. In order to enhance its power capacity the electrodynamic structure is modified by detailed analysis of the field distribution in the coaxial slow-wave structure. The appropriate resonant reflector and the electron collector are developed for the application of the coaxial relativistic backward wave oscillator. A series of surface treatment is applied to enhance the power capacity of the coaxial RBWO. In the experiment, the microwave pulse duration is increased from less than 10 ns to 20 ns, and the output efficiency is enhanced from less than 20% to 34% employing the electron beam pulse of the full width at half maximum 28 ns. The peak power of 1.01 GW at the frequency of 7.4 GHz is achieved. It is found that the output efficiency of the coaxial RBWO is likely to be advanced if its power capacity can be boosted further.

High-efficiency coaxial relativistic backward wave oscillator

2011 ◽  
Vol 82 (2) ◽  
pp. 024701 ◽  
Author(s):  
Yan Teng ◽  
Renzhen Xiao ◽  
Zhimin Song ◽  
Sun Jun ◽  
Changhua Chen ◽  
...  
Keyword(s):  
High Efficiency ◽  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave

A high-efficiency overmoded klystron-like relativistic backward wave oscillator with low guiding magnetic field

2012 ◽  
Vol 19 (9) ◽  
pp. 093102 ◽  
Author(s):  
Renzhen Xiao ◽  
Weibing Tan ◽  
Xiaoze Li ◽  
Zhimin Song ◽  
Jun Sun ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Efficiency ◽  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave

High-efficiency relativistic backward-wave oscillator: theory and design

1995 ◽  
Author(s):  
Baruch Levush ◽  
Thomas M. Antonsen, Jr. ◽  
A. Vlasov ◽  
Gregory S. Nusinovich ◽  
S. M. Miller ◽  
...  
Keyword(s):  
High Efficiency ◽  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave ◽  
Oscillator Theory

High efficiency coaxial klystron-like relativistic backward wave oscillator with a premodulation cavity

2011 ◽  
Vol 18 (11) ◽  
pp. 113102 ◽  
Author(s):  
Renzhen Xiao ◽  
Yan Teng ◽  
Changhua Chen ◽  
Jun Sun
Keyword(s):  
High Efficiency ◽  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave

scholarly journals Design of a high-efficiency dual-band coaxial relativistic backward wave oscillator with variable coupling impedance and phase velocity

2012 ◽  
Vol 31 (1) ◽  
pp. 55-62 ◽  
Author(s):  
Yongfu Tang ◽  
Lin Meng ◽  
Hailong Li ◽  
Ling Zheng ◽  
Bin Wang ◽  
...  
Keyword(s):  
Phase Velocity ◽  
Microwave Power ◽  
High Efficiency ◽  
Wave Structure ◽  
Dual Band ◽  
Coupling Impedance ◽  
Simulation Code ◽  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave

AbstractA dual-band high-efficiency coaxial relativistic backward wave oscillator (CRBWO) with asymmetric resonant reflector is designed and presented in this paper. Improved sectioned coaxial slow wave structure (SWS) with stepwise variation of coupling impedance and phase velocity is employed, and the performance of the dual-band CRBWO is investigated by use of a 2.5-D particle-in-cell (PIC) simulation code. When the diode voltage is 510 kV and beam current is 9.03 kA, an average microwave power of 1.0 GW with power conversion efficiency of 21.7% is obtained. Synchronously radiating dual-band frequencies of 8.1 GHz and 9.9 GHz are obtained, corresponding to C-band and X-band, respectively. A more clear and stable beating radiation microwave power with beating frequency of 1.8 GHz is acquired.

Studies of a high-efficiency, long-pulse relativistic backward wave oscillator

2021 ◽  
Vol 28 (2) ◽  
pp. 023113
Author(s):  
Yibing Cao ◽  
Jun Sun ◽  
Zhimin Song ◽  
Zhiqiang Fan ◽  
Pinzhu Zhang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave ◽  
Long Pulse
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