Application of a pseudospark-generated electron beam to a 200 GHz backward wave oscillator

2015 ◽  
Author(s):  
H. Yin ◽  
D. Bowes ◽  
A. W. Cross ◽  
W. He ◽  
K. Ronald ◽  
...  
Keyword(s):  
Electron Beam ◽  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave

Particle simulation of dual-band coaxial relativistic backward-wave oscillator with a single annular electron beam

2013 ◽  
Vol 25 (5) ◽  
pp. 1184-1188
Author(s):  
唐永福 Tang Yongfu ◽  
蒙林 Meng Lin ◽  
李海龙 Li Hailong ◽  
张斐娜 Zhang Feina
Keyword(s):  
Electron Beam ◽  
Particle Simulation ◽  
Dual Band ◽  
Backward Wave Oscillator ◽  
Annular Electron Beam ◽  
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.

A novel self-injection relativistic backward wave oscillator

2021 ◽  
Author(s):  
Zhiqiang Fan ◽  
Jun Sun ◽  
Yibing Cao ◽  
Zhimin Song ◽  
Yanchao Shi ◽  
...  
Keyword(s):  
Electron Beam ◽  
Conversion Efficiency ◽  
Dominant Role ◽  
Wave Interaction ◽  
Operating Mode ◽  
Beam Current ◽  
Frequency Locking ◽  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave

Abstract A novel self-injection relativistic backward wave oscillator (RBWO) has been proposed. By introducing a self-injection path into the RBWO, a small portion of the energy in the reflector can be coupled to the upstream of the reflector, and then the formed electric field in the self-injection path region can pre-modulate the passing electron beam, to promote a frequency-locking oscillation of the electron beam. The pre-modulated electron beam can be expected to enhance the beam-wave interaction and suppress parasitic mode oscillation, which is beneficial for maintaining the dominant role of the operating mode. The proposed self-injection RBWO shows great potential for improving the conversion efficiency and pulse duration time. Through particle-in-cell simulation, a microwave with a power of 10.6 GW is obtained, when the beam voltage is 1.08 MeV, and the beam current is 18.6 kA. The conversion efficiency is 53%.

scholarly journals Effects of transverse electron beam motion in a relativistic backward wave oscillator operating at low guiding magnetic field

AIP Advances ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 025321 ◽  
Author(s):  
Huida Wang ◽  
Renzhen Xiao ◽  
Changhua Chen ◽  
Ping Wu ◽  
Yanchao Shi
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave ◽  
Beam Motion ◽  
Transverse Electron

scholarly journals Experimental Study on G-Band Oversized Backward Wave Oscillator Driven by Weakly Relativistic Electron Beam

2014 ◽  
Vol 9 (0) ◽  
pp. 3406032-3406032 ◽  
Author(s):  
Shota MAGORI ◽  
Kazuo OGURA ◽  
Takayuki IWASAKI ◽  
Junpei KOJIMA ◽  
Kiyoyuki YAMBE ◽  
...  
Keyword(s):  
Experimental Study ◽  
Electron Beam ◽  
Relativistic Electron ◽  
Relativistic Electron Beam ◽  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave

Relativistic backward wave oscillator with multijet electron beam

2011 ◽  
Vol 37 (2) ◽  
pp. 171-173 ◽  
Author(s):  
M. B. Goykhman ◽  
A. V. Gromov ◽  
V. V. Kladukhin ◽  
S. V. Kladukhin ◽  
N. F. Kovalev ◽  
...  
Keyword(s):  
Electron Beam ◽  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave
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