Chinese Physics C > 2003, Vol. 27 > Issue(9): 828-830

Particle Simulation of Subnanosecond Millimeter Relativistic Backward Wave Oscillator in the Low Guide Magnetic Field Region

Graduate School of CAEP,Mianyang 621900, China2 Institute of Applied Electronics of CAEP, Mianyang 621900, China

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Abstract：
Particle simulation results of coherent stimulated radiation from subnanosecond electron bunches moving through a periodic waveguide and interacting with a backward propagating TM ₀₁wave are presented. The longitudinal guiding magnetic field is 1.8T, the peak power as high as 100 MW for the 300ps pulses at 38GHz. The mechanism of microwave pulse generation was associated with the mutual influence of different parts of the electron pulse due to slippage of the wave with respect to the electrons; The dependence of peak power on the square of the total charge is almost linear, it means that all electrons of e-bunch radiate coherently. This can be interpreted as superradiance.
References

[1] . Ginzburg N S ,Tarakanov V P ,Phelps A D R et al.Phys.Rev.,1999,E60:3297—3304

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ZHANG Yun-Jian, CHEN Hong-Bin, MENG Fan-Bao and FAN Zhi-Kai. Particle Simulation of Subnanosecond Millimeter Relativistic Backward Wave Oscillator in the Low Guide Magnetic Field Region[J]. Chinese Physics C, 2003, 27(9): 828-830.

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Received: 2002-11-18
Revised: 1900-01-01

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Particle Simulation of Subnanosecond Millimeter Relativistic Backward Wave Oscillator in the Low Guide Magnetic Field Region

Corresponding author:ZHANG Yun-Jian,

Graduate School of CAEP,Mianyang 621900, China2 Institute of Applied Electronics of CAEP, Mianyang 621900, China

Received Date:2002-11-18
Accepted Date:1900-01-01
Available Online:2003-09-05

Abstract:Particle simulation results of coherent stimulated radiation from subnanosecond electron bunches moving through a periodic waveguide and interacting with a backward propagating TM₀₁wave are presented. The longitudinal guiding magnetic field is 1.8T, the peak power as high as 100 MW for the 300ps pulses at 38GHz. The mechanism of microwave pulse generation was associated with the mutual influence of different parts of the electron pulse due to slippage of the wave with respect to the electrons; The dependence of peak power on the square of the total charge is almost linear, it means that all electrons of e-bunch radiate coherently. This can be interpreted as superradiance.